Help if u understand for a b c

Golf cart is moving 8 metre in 1 second

so, in 10 seconds it moves 8 × 10 = 80 m

a) velocity = 80/10 = 8 m/s

b) acceleration = v - u / t

= 8 - 0 / 10

= 0.8 m/s²

c) the displacement of the graph is increasing

I hope this answer is correct and helpful to you

i believe the answer would be:

d. violin, clarinet, french horn, and tuba