A programmer plans to develop a new software system. In planning for the operating system that he will​ use, he needs to estimate the percentage of computers that use a new operating system. How many computers must be surveyed in order to be 95% confident that his estimate is in error by no more than one percentage point question mark ? Complete parts​ (a) through​ (b) below. a) Assume that nothing is known about the percentage of computers with new operating systems.   N=_ B.) How many computers must be surveyed in order to be 95% confident that his estimate is in error by no more than two percentage points?

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