An investment strategy has an expected return of $18$ percent and a standard deviation of $10$ percent. Assume investment returns are bell shaped.

a$.$ How likely is it to earn a return between $8$ percent and $28$ percent? $($Enter your response as decimal values $($not percentages$)$ rounded to $2$ decimal places.$)$

Probability

b$.$ How likely is it to earn a return greater than $28$ percent? $($Enter your response as decimal values $($not percentages$)$ rounded to $2$ decimal places.$)$

Probability