I need math help *adjusting expense*

4) Louise saves 15% of her monthly salary of $2475.00 each month. If she is saving for a trip next summer that costs $3500, will she have enough saved after 8 months to pay for her trip? 5) Lena's earns $450.00 per week. She gets a raise of 5%. She saves 13% each week. a) What is her new salary? b) How much will she now save each week