In a survey of3313 adults aged 57 through 85​ years, it was found that 88.6​% of them used at least one prescription medication.    a. How many of the 3313 subjects used at least one prescription​ medication?   ​(Round to the nearest integer as​ needed.)   b. Construct a​ 90% confidence interval estimate of the percentage of adults aged 57 through 85 years who use at least one prescription medication. ​(Round to one decimal place as​ needed.

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A: https://drive.google.com/file/d/1S_b_En4yZMZPhsaGfBA2eE_M0IJFOVeW/view?usp=sharing

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