Unknown problem no. 11 Jens is 14 years old and wants to save money to buy a new computer that costs 10,900 DKK at the time of purchase. He therefore decides to deposit DKK 650 at the end of each month for 20 months on a bank account giving an interest rate of 0.65% calculated annually. The first payment is made in exactly one month. In which interval is given the balance (in DKK 1,000) on the account after 20 months? A. 19.45; 9.65] B. 210.70; 11.00] C. ]12.65; 12.95] D. 19.10; 9.20] E. ]11.00; 11.40] *F. [12.90; 13,20] Unknown problem no. 12 Mads is 13 years old and wants to save money to buy a new computer that costs 7,900 DKK at the time of purchase. He therefore decides to deposit DKK 375 at the end of each month for 24 months on a bank account giving an interest rate of 0.5% calculated annually. The first payment is made in exactly one month. In which interval is given the balance (in DKK 1,000) on the account after 24 months? A. 17.80; 8.10) B. 110.40; 10.50] C. 19.75; 9.85] D. 210.70 ; 10.90] E. [11.10; 11.30] *F. 18,90; 9,20]