Suppose your friend's marginal rate of substitution is two pop for one ice cream bar at their present level of consumption. Their income is $100, the price of a pop is $ 2.00 and the price of an ice cream bar is $10.00. Is your friend maximizing their welfare?Why or why not? If not, what should they do?

Illustrate and carefully explain your answer with an economic explanation.

x = ice cream

y = pop