1. Fill in the following table

	0	1	2	3	4	5
cash flow	-10000	3000	3000	3000	3000	3000
outstanding credit		8523.82				-
financial expenses	/		1298.88			396.70
devaluation principal	/				2259.06
interest rate		/	/	/	/	/

2. Calculate the duration of the following rents

time	1	2	3	4	5	6	rate
	100	100	100				10%
-100	100	100					IRR
	100	100	100	100	100		10%
	100	100	100	100	100	100	10%
	10	10	10	10	10	110	10%