I take this course online so ive been struggling on this problem for a minute.. can anyone help? thanks!

The following represent statistics of weekly salaries at the Harper Publishing Company.
Mean = $470 Median = $475 Mode = $460 Standard deviation = $30 First Quartile = $450
Third Quartile = $485 79th Percentile = $545 P67 = $483
a) What is the most common salary?
b) What salary did half the employees surpass?
c) About what percent of employee’s salaries is below $485?
d) What percent of the employees are above $450?
e) What salary is 3 standard deviations below the mean?
f) About what percent of employee’s salaries is above $483?
g) What salary is 2 standard deviations above the mean?
h) Assume the weekly salaries are normally distributed, about what percent of the salaries are between $410 and $530?