A vegetable garden is in the shape of a parallelogram with the dimensions shown.Parallelogram A B C D is shown. The length of A B is (4 r minus 2) feet, the length of B C is (2 r + 12) feet, and the length of A D is (3 r + 8) feet.
How many feet of fencing are needed to enclose the garden?
54 feet
68 feet
108 feet
140 feet