A confidence interval estimate is desired for the gain in a circuit on a semiconductor device. Assume hat gain is normally distributed with standard deviation =20. a. Find a 95%Cl for when n=19 and x=1200 b. Find a 95%Cl for when n=32 and x=1200 c. Find a 99%Cl for when n=19 and x=1200 d. Find a 99%Cl for when n=32 and x=1200 e. How does the length of the Cls computed above change with the changes in sample size and confidence level? f. How large must n be if the length of the 95%Cl is to be 42