Several researchers tried to test some implications of consumer theory using data on food stamps recipients.

(a) If a food stamp recipient, call him Foster, chooses an "inframarginal" basket after receiving food stamps, what does the theory predict he should do if he receives a cash transfer of the same value instead of food stamps?

(b) If a food stamp recipient, call her Ruhi, chooses a "marginal" basket after receiving food stamps, what does the theory predict she should do if she receives a cash transfer of the same value instead of food stamps?

* please give me the correct answer with explanation and conclusion.