16. A projectile is fired from the top of a cliff of height h above the ocean below. The projectile is fired at an angle 0 above the horizontal and with an initial speed v. (a) Find a sym- bolic expression in terms of the variables v, g, and 0 for the time at which the projectile reaches its maximum height. (b) Using the result of part (a), find an expression for the max maximum height h above the ocean attained by the pro- jectile in terms of h, v, g, and 0