Mason enjoys reading also drinking Coke. A digital book on Kindle on average costs him $7 and a small bottle of Coke costs him $5. Denote the quantity of digital books Mason purchases as B, and the quantity of Coke as C. Mason has $200 in his pocket and he has utility function: Input the expression in the following blanks (omitting multiplication sign and using numbers in decimat form, e.g. 0.53 instead of 1i2'B; write down B then C; write down the demand start with the constant: e. g. 6-2/P) The marginal utility of B = The marginal utility of C = Input the numbers in the following blanks (round to 2 decimat points, even for integers): The optimal choice of B = The optimal choice of C = The optimal Utility level =