(a)The market demand product is X and X is: Qd = f(Px, Py, M), where Qd is the quantity of product X demanded, Px is the unit price of product X, Py is the unit price of a related product Y, and M is income of consumers of product X. Other things equal, what is the impact when:

i.an increase in consumers' income (M) on the market demand of product X.

a decrease in price of X (Px) on the market demand of product X