Sally Rogers, an employee of Advanced Ideas, Inc. has a gross salary of $45,000 per year. Her company will match employee 401K contributions up to 5% of the gross salary.

Due to personal financial constraints, Sally is only able to put 2% of her salary into her 401K during her first two years. However, after receiving a 3.5% raise at the end of her first year and a 4.0% raise at the end of her second year, she is able to up her 401K contribution to 5% at the beginning of her third year.

a.

To calculate Sally's 401K contribution during her first two years, you can follow these steps:

1. Find the amount of Sally's gross salary by multiplying her annual salary by the percentage contribution.
- For year one, Sally contributes 2%, so her contribution is 2% of $45,000.
- For year two, Sally still contributes 2%, so her contribution is 2% of her new salary after the 3.5% raise.

2. Calculate the raise amount using the given percentages.
- For year one, Sally receives a 3.5% raise, so her new salary is $45,000 + 3.5% of $45,000.
- For year two, Sally receives a 4.0% raise, so her new salary is her previous year's salary + 4.0% of her previous year's salary.

3. Calculate the actual 401K contribution for each year.
- For year one, Sally's contribution is 2% of $45,000, which is $900.
- For year two, Sally's contribution is 2% of her new salary after the raise.

For the third year, Sally increases her 401K contribution to 5% of her gross salary. To calculate her contribution for this year, use the following steps:

1. Determine Sally's gross salary for the third year.
- To find Sally's gross salary for the third year, apply a 4.0% raise to her second year's salary.

2. Calculate Sally's 401K contribution for the third year.
- Multiply the gross salary for the third year by 5% to find Sally's 401K contribution amount.

Please provide the salary increase percentages for the first two years to proceed with the calculation.