Suppose you could use wheels of any type in the design of a soap box-derby racer (an unpowered, four-wheel veh?

Suppose you could use wheels of any type in the design of a soap box-derby racer (an unpowered, four-wheel vehicle that coast from rest down a bill). To conform to the rules on the total weight of the vehicle and rider, should you design with large mive wheels or small light wheels? Should you use solid wheels or wheels with most of the m at the rim? Explain.