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Base current in a CE transistor circuit from collector-circuit values and current gain

This type of question, asked 2 times: May 2021 S1, 4 May 2023 S1. All 2 questions below, oldest first.

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  1. Question 1

    May 2021 S1

    Figure-based question showing common emitter amplifier circuit
    35
    A common emitter amplifier circuit built using an n-p-n transistor is shown in figure. Its DC current gain is 300, RC=4 kΩR_C = 4\ \text{k}\Omega and VCC=20 VV_{CC} = 20\ \text{V}. What is the minimum base current for VCEV_{CE} to reach saturation?

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  2. Question 2

    4 May 2023 S1

    3
    The collector supply voltage is 6 V and a voltage drop across a resistor of 600 Ω600\,\Omega in the collector circuit is 0.6 V, in a circuit of transistor connected in common emitter mode. If the current gain is 20, then the base current is

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