Matthew and Susan are both optimizing consumers in the markets for shirts and hats,where they pay $100 for a shirt and $50 for a hat. Matthew buys 4 shirts and 16 hats, whileSusan buys 6 shirts and 12 hats. From this information, we can infer that Matthew’smarginal rate of substitution is _____ hats per shirt, while Susan’s is _____.a. 2, 1b. 2, 2c. 4, 1d. 4, 2