Eugene and Shanice each improved their yards by planting grass sod and geraniums. They bought their supplies from the same store. Grass sod costs dollars and geraniums cost dollars. Eugene spent $36 on 9 ft² of grass sod and 2 geraniums. Shanice spent $63 on 9 ft² of grass sod and 5 geraniums. What is the solution to the system of equations? What is the cost of one ft² of grass sod and the cost of one geranium?