Which function of management answers 'What is to be done, when, how, and by whom'?

1. Planning sets objectives and decides courses of action in advance. 2. It deals with the four questions: What, When, How, By whom. 3. Organising deploys resources, Staffing fills positions, Directing supervises execution. 4. Hence Planning is the answer. _Source: Maharashtra Balbharati Std XII OCM, Ch 2 "Functions of Management", §2.2 ¶§2.2.1_