Known: π 1 = 50 πΩ, π 2 = 10 πΩ, π πΆ = 600 Ω, π πΈ = 400 Ω, ππ΅πΈ = 0.81306 V, πΌπ΅ = 4.48756e − 005A, πΌ2 = 0.000262604 A, and π1 = 18 V. D1 has the break-down VZ = 16V and forward VD = 0.8V, VCE sat=0.4V In green, known values, in red, unknown values. Find: 1. DC analysis: find the collector-emitter voltage, ππΆπΈ , and the collector current, πΌπΆ 2. DC sweep: The following graph is the simulation result of the VCE (on Y axis) vs. V1 (on X axis). That is, for V1 varying from -5V to +25V, the graph shows the variation of the VCE. Identify on the graph the three states of the transistor and the three states of the diode: for example, for the A-B interval, the diode is in ??? mode and the transistor in ??? mode. The VCE value is approximately constant at a value of ??? TIP: look into the collector current variation over the V 1 variation. Simulate Simulate the two requirements above using the standard npn transistor, as indicated below. Note: use the standard npn transistor (see below) Results comparison Compare the analytical results vs. the simulated ones and comment.