2. Calculate Bob's marginal utilities (ul(Ta, Te) and u2(Ta, Xc)). 3. Calculate Bob's MRS. Does Bob have diminishing MRS? Explain. 4. Find Bob's optimal consumption bundle.Bob also consumes apples and cookies. Let r. E R. be the amount of apples and r. E R. be the amount of cookies. His consumption bundle is denoted by (Ta, I.). Suppose Pa = 2 (price of one apple), Pe = 1 (price of one cookie), and m = 20 (income he can spend for his consumption). Suppose that Bob's preference is represented by the following Cobb-Douglas utility function: 1. Draw Bob's budget line and indifference curves such that u(1,, r.) = 600, 1200, and 1800