Scenario: You have a hill in your backyard that needs to be cut in half for a retaining wall. You want the retaining wall to extend from the hillside 2 feet, so you can plan a garden using the upper space. You want this garden to be at a height of 2 feet.
 The hill is 3 feet tall at the top, and the sloping distance of the hillside from the top to the bottom is 5 feet.
 The width of the fence line is 100 feet.
 The fence line is 62 feet from the back of the house.
 Where, in the hill, should you start digging to remove the dirt and place the retaining wall?
 Choose the type of brick to use. Brick A: measures 12x2x3 inches and costs $1.29 per brick. Brick B: measures 12x2x6 and costs $2.38 per brick.
also Draw a diagram to illustrate the problem of the retaining wall.