Given a resistor 50Ω connected to a supply of 15 V. What should be the minimum power rating it can handle without getting burned? (1pt) b) Given below is a Wheatstone bridge with R 1=10kΩ,R2=20kΩ,R3=30kΩ. At null balance (i.e. V 0​ =0 ) Find the value of R 4​ ? (1pt)