The current indoor world record time in the 200-m race is 19.92 s, held by Frank Fredericks of Namibia (1996), while the indoor record time in the one-mile race is 228.5 s, held by Hicham El Guerrouj of Morroco (1997).

a) Find the mean speed in meters per second corresponding to the record times for the 200-m event and

b) find the mean speed in meters per second corresponding to the record time for the one-mile event.