7. We Are Piglet Farms wants to create a pen using their barn for one of the sides as shown below. The farms want to enclose an area of 22,500 square feet. What are the dimensions of the least amount of fencing needed t accomplish this? BARN 7. 8. An open box with a volume of 72 cubic feet is to be constructed with a square bottom. The cost per square foot for the bottom is 10 cents and for the sides is 15 cents. What dimensions will minimize the cost? 8. 9. If the surface area of a closed top right circular cylinder is 241: square inches, what is the maximum volume of that cylinder