From the circuit shown in example 1-21 of the text what size resistor would be needed if the circuit was to be limited to 90% of the saturation current and V 1 = 10V? Utilizing the circuit shown in...

From the circuit shown in example 1-21 of the text what size resistor would be needed if the circuit was to be limited to 90% of the saturation current and V₁
= 10V?

Utilizing the circuit shown in example 1-21 of the text what size resistor would be needed if the circuit current was to be limited to 80% of the saturation current and the voltage and V1 = 10V was increased by 20%?