please do a b c

The number of hits per day on the Web site of a tool company is normally distributed with a mean of 600 and a standard deviation of 130 . a. What proportion of days have more than 740 hits? b. What proportion of days have between 620 and 740 hits? c. Find the number of hits such that only 15% of the days will have the number of hits below this number. Click the icon to view the standard normal table of the cumulative distribution function