the drawing shows two planes each dropping an empty fuel tank. at the moment of release each plane has the same speed of $157$ m$/$s$,$ and each tank is at the same height of $4\mathrm{.}97$ km above the ground. although the speeds are the same, the velocities are different at the instant of release, because one plane is flying at an angle of $15$ above the horizontal and the other is flying at an angle of $15$ below the horizontal. find the magnitude and direction of the velocity with which the fuel tank hits the ground if it is from plane A$.$ find the magnitude and direction of the velocity with which the fuel tank hits the ground if it is from plane B$.$ in each part, give the direction as a positive angle with respect to the horizontal