This is in Basic calculus all about Applications of functions. Provide clean and clear handwritten solutions thank you and Godbless.

2. The demand function of a plastic folder is given by 10x + 30y = 360, where x represents the quantity demanded and y represents the price in pesos. a. What is the highest price to be paid for this plastic folder? b. How many units will be demanded if the unit price of folder is P10.00? c. What is the largest quantity demanded for this item? d. What is the price of the folder if the quantity demanded is 30 units? e. Graph the demand function