Master Study: A Phase 2, Umbrella Study with Rolling Arms of Investigational Agents with either Pembrolizumab in Combination with Chemotherapy or with Pembrolizumab Alone in Patients with Advanced Non-small Cell Lung Cancer (NSCLC) KEYMAKER-U01 Substudy 1: A Phase 2, Umbrella Study with Rolling Arms of Investigational Agents with Pembrolizumab in Combination with Chemotherapy in Treatment-Naïve Patients with Advanced Non-small Cell Lung Cancer (NSCLC) (MK-3475-01A) – NCT04165070 KEYMAKER-U01 Substudy 2: A Phase 2, Umbrella Study with Rolling Arms of Investigational Agents in Combination with Pembrolizumab in Treatment Naïve Patients with PD-L1 Positive Advanced Non-small Cell Lung Cancer (NSCLC) (MK-3475-01B) – NCT04165083 KEYMAKER-U01 Substudy 3: A Phase 2, Umbrella Study with Rolling Arms of Investigational Agents in Combination with Pembrolizumab in Patients with Advanced Non-small Cell Lung Cancer (NSCLC) Previously Treated with anti-PD-(L)1 Therapy (MK-3475-01C) – NCT04165096 A Phase 2, Umbrella Study with Rolling Arms of Investigational Agents with either Pembrolizumab in Combination with Chemotherapy or with Pembrolizumab Alone in Patients with Advanced Non-Small Cell Lung Cancer (NSCLC)