Henry was reviewing the water bill for his doggy day spa and determined that his highest bill, $2,800, occurred in August when he washed 1,400 dogs and his lowest bill, $2,600, occurred in November when he washed 900 dogs. (Show all work) a. What was the variable rate for Henry's water bill? b. What was the fixed rate for Henry's water bill? What would Henry's water bill be if he washed 1,880 dogs? c