Please answer.

What is the margin of error in a large sample confidence interval for a population mean? O a) tal2 O b) Za /2 im ) O c ) Zal2 V p(1-p) n O d ) tal p(1-p) nWhat is the margin of error on a 99% confidence interval for a population mean given o = 9 and n = 64? a. 2.90 O b. 13.72 c. 1.92 O d. 0.38