Assignment:
From a raft 50m offshore, a lifeguard wants to swim to shore and run to a snack bar 100m down the beach.
a. If the lifeguard swims at 1m/s and runs at 3m/s, express the total swimming and running time t as a function of the distance
b. Find the minimum time.
Provide complete and step by step solution for the question and show calculations and use formulas.