I am having some trouble with this problem. Thank you so much in advance for your help

Velocity and trajectory length The acceleration of a wayward firework is given by a(t) = V2 j + 2tk, for 0 = t s 3. Suppose the initial velocity of the firework is v(0) = i. a. Find the velocity of the firework, for 0 S t = 3. b. Find the length of the trajectory of the firework over the interval 0