(1 point) The displacement (in meters) of a particle moving in a straight line is given by s=t? - 7t + 12,

where t is measured in seconds.

(A)

() Find the average velocity over the time interval [3,4].

Average Velocity =

(11) Find the average velocity over the time interval (3.5,4).

Average Velocity =

(iii) Find the average velocity over the time interval [4,5).

Average Velocity =

(iv) Find the average velocity over the time interval [4,4.5).

Average Velocity =

(B) Find the instantaneous velocity when t = 4.

Instantaneous velocity =