Q1:

Consider the common emitter amplifier shown below with the following circuit parameters: β = 100, g_m = 0.3861 A/V, r₀ = ∞ r_p = 259 Ω, R_s = 1 kΩ, R_B = 93 kΩ, R_C = 250 Ω, R_L = 1 kW, C₁ = ∞ and C₂ = 4.7mF.

The resistance seen by the source Vs is

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