EFTs: no more than two prior chemotherapy-containing lines in the metastatic/recurrent setting. Has received no more than previous lines of chemotherapy and has received at least two lines of chemotherapy in the metastatic setting. No more than lines of chemotherapy in the metastatic setting. Must have received or more prior lines or therapy in the metastatic setting No more than prior chemotherapy regimen in the metastatic setting for the phase portion; patients in the phase portion could have received any number of prior lines of therapy Patients must have had two or more lines of prior therapy (chemo or hormonal) in the metastatic setting More than lines of chemotherapy in the metastatic setting; no limit on endocrine therapy lines; prior exposure to CDK/ inhibitor acceptable More than previous lines of therapy in the metastatic setting. > lines of prior chemotherapy in the metastatic setting Any number of prior lines of chemotherapy in the metastatic setting is allowed Patients must have had at least lines of anti-HER directed therapies either in the metastatic or early-stage disease setting Have received treatment with at least one or more lines of cytotoxic chemotherapy in the metastatic setting. More than two prior lines of cytotoxic chemotherapy (e.g., gemcitabine, doxorubicin, capecitabine) for metastatic disease. Part B: Subject must not have received any prior lines of chemotherapy in the metastatic setting (prior treatment with immunotherapy is allowed). Patients with chemotherapy for metastatic disease (patients with - prior lines of chemotherapy for metastatic breast cancer [MBC]) More than two previous treatment lines of systemic antineoplastic therapies in the advanced setting More than prior lines of systemic antineoplastic therapies in the advanced setting The patient must have received at least and no more than prior lines of treatment in the metastatic setting. No more than prior lines of systemic chemotherapy for metastatic urothelial cancer Unlimited number of lines of endocrine therapy and up to two lines of cytotoxic chemotherapy in the metastatic setting (Phase Ib) Unlimited number of lines of endocrine therapy and one line of cytotoxic chemotherapy in the metastatic setting (Phase II) More than prior lines of chemotherapy for metastatic breast cancer. No more than two lines of prior cytotoxic chemotherapy in the recurrent/metastatic (palliative intent) treatment setting More than two prior lines of cytotoxic chemotherapy in the recurrent/metastatic disease setting (palliative treatment intent)(excluding single agent use of an EGFR inhibitor) More than three prior lines of cytotoxic chemotherapy for metastatic disease Participants may have - prior lines of cytotoxic chemotherapy in the metastatic setting Patients may not have received any cytotoxic chemotherapy for treatment in the metastatic setting For patients in the dose-expansion cohort of the study, not more than two prior lines of cytotoxic chemotherapy in the metastatic setting Participants must have already received or been intolerant to at least two lines of hormonal therapies (including the adjuvant or metastatic setting) or be appropriate candidates for chemotherapy History cancer with no limitation on prior lines of therapy in the metastatic setting One, , or prior lines of chemotherapy for metastatic disease and with progression of disease on last treatment regimen.