Answer:[tex]1. i = p \times r \times t \\ \\ i = 6200 \times 0.04 \times 1 \\ i = 248 \\ 2.i = p \times r \times t \\ i = 50000 \times 0.08 \times 3 = 12000 \\ 3.t = i \div p \times r \\ t = 8586 \div 15900 \times 0.09 \\ 15900 \times 0.09 = 1431 \\ t = 8586 \div 1431 \\ t = 6years \: [/tex]Step-by-step explanation:thank you