Kayla and Matt each improved their yards by planting grass sod and ornamental grass. They bought their supplies from the same store. Kayla spent $47 on 6 ft² of grass sod and 7 bunches of
ornamental grass. Matt spent $17 on 6 ft² of grass sod and 1 bunch of ornamental grass. What is
the cost of one ft² of grass sod and the cost of one bunch of ornamental grass?