please help! It's grade 11 college math. It's on compound Interest. For Q4 please let me know of It's a, b, c or d. Thank you so much!

4. This graph shows the growth of an investment of $5000. Investment Growth $6,500 $6.700 56.600 $6.500 $6,400 $6,300 $6,200 $6.100 $6,000 5, 700 $5.900 $5,500 5, 600 $5.700 5, 5,00 $5,600 5 400 $5.500 5:300 $5.401 $5.500 5 1 200 55.200 5, 100 55.100 51000 $5.000 Years 3 S C The investment has an interest rate of a. 6% which decreases over the term shown. b. 6% compounded over the term. c. 6% which is not compounded over the term. d. 9% to start and increasing over the term. Use this graph to answer the following questions. Investinent Growth 3, 100$3,100 3: 000 53,090 2. 900 52,900 2, 800 $2,800 2. 700 $2, 00 2. 600 $2.600 2. 500 $2,500 2, 400 52,400 2, 300 $2.300 2.200 $2.200 2.100 $2.190 21000 $2,090 Years 2