A projectile of mass 2.5 kg is fired with a speed of i? rnfs at an angle of 12 degrees with respect to the horizontal. a. Calculate the initial total energy of the projectile given that the reference point of zero gravitational potential energy at the launch position. l :ifi1.:-5 | = 361.3 J b. Calculate the kinetic energy at the highest vertical position of the projectile. l 345.? | = 345.? J c. Calculate the gravitational potential energy at the highest vertical position. l 1m | =15.E> .l d. Calculate the maximum height that the projectile reaches. Compare this result by solving the same problem using your knowledge of projectile motion. Hint: For Part a, given the reference point, vvhat can you say about the initial potential energy? For Part b, note that the vertical velocity is zero at this point but the horizontal velocity rernains constant throughout the flight. For Part c, energy is conserved, so some of the initial total energy has changed into potential energy. For Part d, use the potential energy in Part c. to find the height