QUESTION 2 (Current Mirror) Determine an expression for RP so that I1 = IREF/2 for the circuit shown in Figure 2. Find this expression in terms of IREF, and other transistor parameters (μCox, (W/L) ) Assume that both transistors are identical, i. e. , [μCox(W L)]REF = [μCox(W L)]1, VthREF = Vth1