I really need help with these practice questions pleasee.

4. Two other helicopters are also coming for the rescue. Helicopter K's position after t seconds is given by: x(t) = 5 - 2t. y[t) = 4 - 3t. z(t) = 4 + 4t Helicopter M's position aftert seconds is given by: x(t) = 1. y(t} = - 4 - 2t. 2(t] = 14 + 21 All distance units are in metres. E.) Find the initial position of each helicopter. b) Find the velocity vector of each helicopter. c) Will the helicopters collide? Explain why or why not. 5. After Tony and Steve got off the helicopter. they were picked up by an ambulance. The I ambulance moves In a straight line with position given by s{t) = Bae' 40t m where t is time in seconds. t 2 0. a) Find the velocity and acceleration functions. b) Find the initial position. velocity. and acceleration of the ambulance. c) Find the exact time when the velocity Is 44 ms"