can you help to write a c++ program for below two questions

Many private water wells produce only 1 or 2 gallons of water per minute. One way to avoid running out of water with these low-yield wells is to use a holding tank. A family of four will use about 250 gallons of water per day. However, there is a "natural" water holding tank in the casing (that is, the hole) of the well itself. A deeper well stores more water that can be pumped out for household use. But how much water will be available? Write a program that allows the user to input the radius of the well casing in inches (a typical well will have a 3-inch radius) and the depth of the well in feet (assume water will fill this entire depth, although in practice that will not be true since the static water level will generally be 50 feet or more below the ground surface). The program should output the number of gallons stored in the well casing. For your reference, the volume of a cylinder is p r2h, where r is the radius and h is the height, and 1 cubic foot = 7.48 gallons of water. For example, a 300-foot-well full of water with a radius of 3 inches for the casing holds about 441 gallons of water-plenty for a family of four and no need to install a separate holding tank. 14. Write a program that calculates the total grade for N classroom exercises as a percentage. The user should input the value for N followed by each of the N scores and totals. Calculate the overall percentage (sum of the total points earned divided by the total points possible) and output it as a percenta Sample input and output is shown below. How many exercises to input? 3 Score received for exercise 1: 10 Total points possible for exercise 1: 10 Score received for exercise 2: 7 Total points possible for exercise 2: 12 Score received for exercise 3: 5 Total points possible for exercise 3: 8 Your total is 22 out of 30, or 73.33%