Please help meee! I'll make you brainliest or anything you want I swear! I'm desperate​

Your neighbor is putting in a small square deck with side length x+4, as pictured below, where x is measured in feet. (x + 4) (x + 4) Part A Write a polymonial in standard form that represents the area of the deck Part B. Write an expression for the cost of the lumber for the top of the deck if the lumber costs $5 per square foot. Part C. If x = 3 feet what will be the cost of lumber for the top of the deck?

Please help meee! I'll make you brainliest or anything you want I swear! I'm desperate​