Question: Does a confidence interval for built from some collected sample mean get wider or narrower if: (a) the percent of desired confidence (confidence level) increases

Does a confidence interval for built from some collected sample mean get wider or narrower if:
(a) the percent of desired confidence (confidence level) increases from 85% to 90%?
(b) the size of the sample used to produce the confidence interval is decreased?
(c) the standard deviation gets smaller?

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