Resistors of various capacities are purchased in lots of 100, with specifications that each resistor have variability (as given by a relative standard deviation) of 2%. Assume that a 10-ohm and a 20-ohm resistor are selected at random from those purchased. a. Calculate the expected value and variance of the overall resistance if the two resistors are connected in series. b. Calculate the expected value and variance of the overall resistance if the two resistors are connected in parallel. c. Determine wh variation ich arrangement of these two resistors (series or parallel) yields the smaller coefficient of Variation.