first question: An investor deposits an amount of 1000 dinars at the beginning of a month and for a period of two years, and he withdraws an amount of 800 dinars at the end of every two months and for a period of two years. If the bank calculates a simple interest rate of 6% annually on deposits and withdrawals. What is the balance of the depositor at the end will be converted

second question: A merchant deposits an amount of 2500 at the end of a month starting from the end of January 2015 in the bank and made regular deposits until the end of August of the same year, and the bank calculates simple interest 8% annually. What is the deposited balance on 12/31/2015 in the bank?

third question: As an investment expert, one of the investors offered you my case The following investment: (First) Deposit a regular semi-monthly payment for a full year Its value is 500 dinars, with an interest rate of 7%. (Second) Deposit a regular payment at the end of each month for a full year Its value is 1000 dinars, with an interest rate of 7%.

Which of the two cases is better for this investor?