Determine the amount of interest earned by the specified annuity. 1. The increasing annuity in Exercise 1

Question:

Determine the amount of interest earned by the specified The increasing in Exercise 1
Refer in Exercise 1,
If, at the end of each month, $100 is deposited into a savings account paying 2.1% interest compounded monthly, the balance after 10 years will be $13,340.09.
2. The increasing in Exercise 2
Refer in Exercise 2,
Mr. Smith is saving to buy a $200,000 yacht in January 2020. Since January 2010, he has been depositing $8231.34 at the end of each half year into a fund paying 4% interest compounded semiannually?
3. The decreasing in Exercise 3
Refer in Exercise 3,
In order to receive $2000 at the end of each quarter year beginning in 2015 until the end of 2019, Ms. Williams deposited $36,642.08 into an investment paying 3.4% interest compounded quarterly?
4. The decreasing in Exercise 4
Refer in Exercise 4,
A retiree deposits $185,288.07 into an investment paying 2.7% interest compounded monthly and withdraws $1000 at the end of each month for 20 years?
Annuity
An annuity is a series of equal payment made at equal intervals during a period of time. In other words annuity is a contract between insurer and insurance company in which insurer make a lump-sum payment or a series of payment and, in return,...