a) 32/8= 4
32/20= 1.6
84/30= 2.8
100/40= 2.5
4+1.6+2.8+2.5= 10.9
10.9/4=2.725 so on average the bassett travels 2.725 yards per second
b) the bassett stops moving for 12 seconds, I know this because between seconds 8 and 20, there is no rise in yards
c) 20 to 30 seconds because it has the steepest increase in yards, with the least time passed.