Answer Happy

Please give a proper explanation and show methodology ,I'veposted this question before however ,the person just gave an answerwithout breaking down properly how to extract relavantinformation.PLEASE DO NOT COPY OTHER ANSWERS ON answers I WILL REPORTYOU IF YOU DO.
An online retailer is experimenting with deploying unmanned aerial vehicles (drones) for deliveries. When making a delivery, the drone is required to drop its parcel at pre-specified coordinates. Every second, as it is aligning for the drop, it calculates the Euclidean distance d from its current position to the desired drop location. It then uses PID control to stabilise around the drop location. The distances calculated over the first 4 seconds are: Time (s) Distance (m) 1.2 1.1 0 1 2 3 0.9 0.7 (a) Compute the proportional control for t = 4. (b) Compute the derivative control for t = 4. (c) Compute the integral control for t = 4. (2) (2) (2)