Problem: A consumer must spend all of her income on two goods (X and Y). In each of the following scenario, indicate whether the equilibrium consumption of goods X and Y will increase or decrease. Assume good X is a normal good and good Y is an inferior good.
a. Income doubles
b. Income quadruples and all price double
c. Income and all prices quadruples
d. Income is halved and all prices double
Please show work.