2. Basic projectile motion problem.
Consider motion in the vertical direction to get t, the time it takes to land (u = 0, y = 0.734 m, a = g = 9.8 m/s^2, t = ?).
Consider motion in the horizontal direction to get x, the distance from the table (u = 0.122 m/s, a = 0, t = see above, x = ?).
3. . Set T = 57 N.