Csn you please help me with these problems thank you

To save for your newborn son's college education, you will invest $100 at the end of each month for the next 18 years. The interest rate earned is 12 percent. What is the value of the 529 Plan upon the beginning of the first semester of college? An investor expects to receive $10,600 at the end of three (3) years. If he expects to earn 6%, compounded annually, what is the present value or amount that should be paid for the investment today? Mortgage rates have been the lowest in over 45 years. Knowing this information, it is now time to take advantage of such rates and buy a house. If your bank rate is 4.96%, and desire your payment to be no more than $1,038.29. How much value of home can you afford today? (Use monthly compounding on a 30 year loan.)