Jennifer is a salesman for the local car dealership. She can divide her 40-hour work between talking to customers that walk in the door and calling possible prospects. Let W be the number of hours each week she spends on walk-ins, and let P be the number of hours spent on calling prospects. Jennifer sells depends on the time she spends on these tasks as follows: N(W,P) = 0.9W - 0.01W^2 + 0.3P a) Write down Jennifers constrained optimization problem. b) How should he divide her time between walk-ins and calling prospects?