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Q4. A ship is test firing a towing line by the use of a rocket launcher. The rocket hits a target on land that is 80 m higher than the launcher and 540 m away horizontally. The rocket hits this target 7.2 seconds after being fired. Neglect air resistance on the rocket or towing line.

Calculate EACH of the following:

(a) the elevation of the rocket launcher. (7)

(b) the speed of the rocket as it leaves the launcher. (2)

(c) the speed of the rocket as it hits the target. (4)

(d) the angle of the rocket as it hits the target. (3)