According to a government study among adults in the 25- to 34-year age group, the mean amount spent per year on reading and entertainment is $2,035. assume that the distribution of the amounts spent follows the normal distribution with a standard deviation of $601. (round z-score computation to 2 decimal places and your final answer to 2 decimal places. omit the "%" sign in your response.)
(a) what percent of the adults spend more than $2,475 per year on reading and entertainment?
percent %
(b) what percent spend between $2,475 and $3,150 per year on reading and entertainment?
percent %
(c) what percent spend less than $1,025 per year on reading and entertainment?
percent