PLEASE HELP ASAP

A cannon with its open end at an initial height of 1.5 meters above the ground fires a cannonball at an angle of 40 above the horizontal. Ittravels a horizontal distance of 40.0 meters to a 4.0 meter high wall, and passes over 3.0 meters above the wall at a time 2.4 seconds after launch. (Ignore air resistance)

a. Determine the initial speed of the cannonball as it is fired.

b. Is the cannonball at the highest point in its trajectorywhen it passes over the wall? Justify your answer.

c. If the same cannonball is fired with the same initial speed at an angle of 55.5 above the horizontal, willthe ball will still go abovethe castle wall? Justify your answer.

d. Indicate whether the launch angles listed below result in a range that is more than, less than, or equal to the range that could be achieved with a 45 launch at the launch speed determined in part (a) by placing an "X" in the appropriate location.

di. 40 launch ( ___ more than / ___less than / ___equal to)

dii. 55 launch ( ___ more than / ___less than / ___equal to)