Which data set has the widest spread?
data set a: 1, 1, 2, 1, 2, 1
data set b: 2, 2, 4, 4, 3, 3
data set c: 1, 1, 2, 2, 1, 5
data set d: 3, 5, 5, 5, 5, 4

Robert is placing sod in two square shaped areas of his backyard. one side of the first area is 7.5 feet. one side of the other area is 5.7 feet. the sod costs y dollars per square foot