(1) prompt the user to input a wall's height and width. calculate and output the wall's area. (submit for 2 points)enter wall height (feet): 12enter wall width (feet): 15wall area: 180 square feet2) extend to also calculate and output the amount of paint in gallons needed to paint the wall. assume a gallon of paint covers 350 square feet. store this value using a const double variable. (submit for 1 points, so 3 points total).enter wall height (feet): 12enter wall width (feet): 15wall area: 180 square feetpaint needed: 0.514286 gallons3) extend to also calculate and output the number of 1 gallon cans needed to paint the wall. hint: use a math function to round up to the nearest gallon. (submit for 2 points, so 5 points total).enter wall height (feet): 12enter wall width (feet): 15wall area: 180 square feetpaint needed: 0.514286 gallonscans needed: 1 can(s)