Consider the circuits on Figures P1a and P1b. The current gain of transistors Q1 and Q2 is B = 50. 1.What type of transistors are Q1 and Q2, shown, respectively, on Figure P1a and Figure P1b? 2. Consider the circuit on Figure P1a. Find the value of R, such that V, = 4 V. 3. Now, consider the circuit on Figure P1b. What is the value of V4 knowing that Q2 is ON?