Ten percent of the items produced by a machine are defective. A random sample of 100 items is selected and checked for defects. (a) Determine the standard error of the proportion. (b) What is the probability that the sample will contain more than 3.7% defective units? (Round your answer to four decimal places.) (c) What is the probability that the sample will contain more than 16% defective units? (Round your answer to four decimal places.)