The LED in Figure shown requires 30 mA to emit a sufficient level of light. For the following circuit values, determine Rc and the amplitude of the square wave input voltage necessary to make sure that the transistor is in Saturation? [Vcc = 9 V, VCE(sat) = 0.2 V, RB = 3.3 kΩ, βDC = 50, and VLED = 1.8 V]