Computing Overtime Rate of Pay and Gross Weekly Pay

Rebecca Huang receives a regular salary of $$2,600$ a month and is paid $\frac{11}{2}$ times the regular hourly rate for hours worked in excess of $40$ per week.

a$.$ Calculate Huang's overtime rate of pay.

overtime pay per hour

b$.$ Calculate Huang's total gross weekly pay if she works $45$ hours during the week.