Please answer it asap Thanks I have to submit it asap

Lisa is 17 years old and works for Rose Plumbing in Alberta and receives a regular salary of $1,125.00 semi-monthly. She has received an increase of 9% that was effective 4 pay periods prior. The current semi-monthly payroll has already been processed based on Lisa's new pay period earnings; the retroactive amount will be paid on a separate cheque. Lisa's pay period earnings are the same as her net taxable income. Her federal and provincial TD1 claims codes are 1. Calculate the income taxes on the retroactive amount