An object moving at 15 m/s slows uniformly at a rate of 2 m/s each secon...

An object moving at 15 m/s slows uniformly at a rate of 2 m/s each second for a time of 6 s. Determine (a) its final speed, (b) its average speed during the 6 s and (c) the distance moved in the 6 s.

a. 2 m/s, 11 m/s, 64 m

b. 3 m/s, 9 m/s, 54 m 

c. 5 m/s, 13 m/s, 44 m 

d. 1 m/s, 2.5 m/s, 34 m