Problem Statement:
You are tasked with powering a phone for 16 minutes using four batteries. Each battery has a specified capacity and recharge time:

Capacities: [2, 2, 1, 5] (in minutes)
Recharge times: [1, 4, 3, 5] (in minutes)

Determine the minimum number of battery depletions required to power the phone for 16 minutes. A battery depletion occurs when a battery is fully used up to its current capacity, after which it requires its recharge time to become available again with its full capacity. Batteries can also be used partially without depleting, in which case they remain available with reduced capacity and do not require recharging.

does anyone know how to solve this question?