At time t = 0, projectile is launched with an initial velocity of 36 m/s at a launch angle 0; from the edge of a 40-meter-tall vertical cliff, where sin 0; = 3/4 and cos 0; = 2/3. What is the object's height above the ground at time t = 4 s? 76 m O 28 m 104 m 56 m 36 m O 64 m 68 m