How exactly do I go about doing this? Need urgent held

The task is to develop a model that will calculate the following aspects of TVM for a user:

1. Monthly payment (incorporate ability to shift between beginning or end of month) (1)

2. Interest paid between two months (1)

3. Principal paid between two months (1)

4. Balance owing (Settlement amount) at a specified month (1)

5. Initial payment if growth starts at a given point in time (arithmetic growth) (2)

Consider the growth for the next few calculations:

6. Interest paid between two months (1)

7. Principal paid between two months (1)

8. Balance owing (Settlement amount) at a specified month (1)

Exclude growth from the following questions.

9. Initial payment if payments are suspended between two periods {2)

Consider the suspension of payments for the next few calculations:

10. Interest paid between two periods (1)

11. Principal paid between two periods (1)

12. Balance owing (Settlement amount) at a specified period (1)

Design and User friendliness of the model (decent attempt, good attempt, very good) (3)

Innovation (bonus functionality and approaches) (little, good, very good) (3)