Whether to contribute to an RRSP or to pay down a home mortgage is a matter of personal risk tolerance and several other considerations. Which of the following does the textbook suggest are scenarios where one should pay the mortgage down first? (Check all that apply)

1. a high personal risk tolerance exists
2. the mortgage interest rate is higher than the return expected from RRSP investments
3. a low marginal tax rate (MTR) when considering an RRSP contribution
4. only a few years remain until retirement
5. the marginal tax rate (MTR)is not expected to change much after retirement
6. a low marginal tax rate (MTR) is expected after retirement