Ely's preferences for bread and soup can be represented by the utility function U(S,B) = S(1 + B). For this utility function, MUS = 1 + B and MUB = S. Soup costs $1 per pint and bread costs $2 per ounce. Ely has $10 to spend. What is the formula for Ely's MRSSB? Does it have the declining MRS property? What is Ely’s best choice? Please explain how you get your answer.