(1 point) A small island is 3 miles from the nearest point P on the straight shoreline of a large lake. If a woman on the island can row a boat 4 miles per hour and can walk 5 miles per hour, where should the boat be landed in order to arrive at a town 7 miles down the shore from P in the least time? Let :1: be the distance (in miles) between point P and where the boat lands on the lakeshore. (a) Enter a function T(:z:) that describes the total amount of time the trip takes as a function of the distance :8. T(:c) : (include (b) What is the distance a: = c that minimizes the travel time? C : (include units) (c) What is the least travel time? The least travel time is (include units)