9. Suppose $4000 is invested for 3 years at 6% compounded monthly. (a) Find the accumulated amount. (3 marks) (b) Find the amount of interest earned in part (a). (1 mark) 10. Evaluate: (3 marks (a) log, 64 ) log, 64 (c ) log2 64 11. Simplify by writing as a single logarithm: (4 marks) 3 (4 log r + 2 logy) - 4log = 12. Solve for r: (3 marks) log- 125 = 3r + 2 13. Solve for r: (4 marks) log(x - 3) + log(r - 5) = 1