Match the following formulas dealing with level ground problems: a) The time a projectile fired from level ground spends in the air b) The angle at which a projectile fired from level ground should be fired at to hit a target a certain distance away c) The horizontal distance a projectile fired from level ground travels 1. T = 2 vO sin / g 2. R = vO^2 sin (2 ) / g 3. = sin^-1 (R g / vO^2 )