Number 1 and 2 show all work please ?

1) Based on the graph below estimate the instantaneous velocity at the following times: (a) 1.0 s; (b) 2.5 s; (c) 3.5 s; (d) 4.5 s; (e) 5.0 s; x (m) 15 10 5 0 t (s) 1 2 3 4 5 6 -51 2) Att = 2.25 s a particle is at x = 7.00 m and has velocity v = 3.50 m/s. At / = 7.00 s, it is at x= -5.10 m and has velocity v = 6.00 m/s. Find: (a) its average velocity; (b) its average acceleration