Please solve it with steps

According to a government study among adults in 25-34 age group, the mean amount spent per year on reading and entertainment is $1994. Assume that the distribution of the amounts spent follows the normal distribution with a standard deviation of $450. I. 1What percent of adults spend more than $2300 per year on reading '5'; entertainment? 2. What percent spend between $2300 and $3000 per year on reading & entertainment? 3. Determine the value below which 95% of the values occur