looking fot help with this please include excel i instrcutions if needed.

3. A midcareer professional couple is interested in purchasing a new home costing $750,000. They can afford a 20 percent, or $150,000 down payment, leaving $600,000 to be borrowed. They prefer to have a conventional loan, and one lender has offered a 30-year loan at 6.75%. a. What is the amount of the monthly payment? (Note: Use 6 decimals for the value of the factor) b. If, immediately after making the one hundred twentieth payment (10 years), the professional couple decides to sell the house. Compute the unpaid balance on the loan. (Note: Use 6 digits for the value of the factors). C. If the home is sold for $850,000 out of which the couple pays realtor fees of $64,000, How much money did they make on the house in the 10 years that they lived in the house