Please help me 2 questions below

1) In four years, Mr. Novak would like to have a rent income for a 6-year period 5,000 USD at the beginning of each half-year. How much does he have to deposit for 4 years on his account (from that decision) at the end of each month if there is for the first 4 years an interest rate 4 % p.a. with a quarter interest period and the following years 3% p.a. with an annual interest period? The income tax rate applied on the interest is 15 % (deductively).

	round 3,091 CZK
	round 2,091 CZK
	round 1,091 CZK
	round 4,091 CZK

2) Calculate a monthly instalment of a mortgage credit in the amount of 1,500,000 CZK which should be paid off in 10 years at an interest rate of 5.50 % p. a.

	round 16,176 CZK
	round 16,376 CZK
	round 16,276 CZK
	round 15,976 CZK