Given below are the number of successes and sample size for a simple random sample from a population. x=8,n=40,99% level a. Determine the sampie proportion b. Decide whether using the one-proportion z-interval procedure is appropriate, c. If appropriate, use the one-proportion z-interval procedure to find the confidence interval at the specified confidence level. d. If appropriate, find the margin of error for the estimate of D and express the confidence interval in torms of the sample proportion and the matgin of error. a. p^= (Type an integer or a decimal. Do not round)