Ely's preferences for bread and soup can be represented by the utility function U (S, B) = S(1 + B.) Soup costs $1 per pint and bread costs PB per ounce. Ely has $10 to spend. What is the formula for Ely's MRSSB? Does it have the declining MRS property? Solve for and graph Ely's price-consumption path (varying PB). For what values of PB is his best choice an interior solution? For what prices is it a boundary choice?