The monthly returns for a financial advisory service can be modeled by a Normal distribution with a mean of $$184$ and standard deviation of $$59,$ per $$10,000$ invested. Find the following boundaries: $($use $4$ decimals for all answers$)$

$($a$)$ the highest $25\%$ of monthly returns:

$($b$)$ the lowest $25\%$ of monthly returns:

$($c$)$ the highest $25\%$ of monthly returns:

$($d$)$ the middle $20\%$ of monthly returns: $$ and $($Enter the lower value first.$)$