I need help with the last picture figuring out the average annual operating income/average amount invested = ARR

Reference Present Value of Annuity of $1 Periods l 1% | 2% | 3% | 4% | 5% | 6% 7% | 8% | 9% | 10% | 12% | 14% | 15% | 16% | 18% | 20% 1 0.990 0.980 0.971 0.9620.952 0.943 0.935 0.926 0.917 0.909 0.893 0.8770.8700.862 0.847 0.833 2 1.970 1.942 1.913 1.8861.859 1.833 1.808 1.783 1.759 1.736 1.690 1.6471.6261.605 1.566 1.528 3 2.941 2.884 2.829 2.7752.723 2.673 2624 2.577 2.531 2.487 2.402 2.322 2.2832.246 2.174 2.106 4 3.902 3.808 3.717 3.6303.546 3.465 3.387 3.312 3.240 3.170 3.037 2.9142.8552.798 2.690 2.589 5 4.853 4.713 4.580 4.4524.329 4.2124.100 3.993 3.8903.791 3.605 3.433 3.352 3.2743.127 2.991 6 5.795 5.601 5.417 5.2425.076 4.9174.767 4.623 4.486 4.355 4.111 3.8893.7843.685 | 3.4983.326 7 6.728 6.472 6.230 6.0025.786 5.582 5.389 5.206 5.033 4.868 4.5644.288 4.1604.039 3.812 3.605 8 7.652 7.325 7.020 6.7336.463 6.210 5.971 5.747 5.535 5.335 4.968 4.639 4.4874.344 4.078 3.837 9 8.566 8.162 7.786 7.435 7.108 6.802 6.515 6.247 5.995 5.759 5.328 4.946 4.772 4.607 4.303 4.031 10 9.471 8.983 8.530 8.117.722 7.360 7.024 6.710 6.418 6.145 5.650 5.216 5.0194.833 | 4.494 4.192 11 10.368 9.787 9.253 8.760 8.306 7.887 7.499 7.139 6.805 6.495 5.938 5.453 5.2345.029 4.656 4.327 12 11.255 10.575 9.9549.385 8.863 8.384 7.9437.536 7.161 6.814 6.1945.660 5.4215.197 4.793 4.439 13 12.134 11.348 10.635 9.986 9.394 8.853 8.358 7.904 7.487 7.103 6.4245.842 5.583 5.342 4.910 4.533 14 13.004 12.106 11.296 10.5639.8999.2958.745 8.244 7.786 7.367 6.628 6.002 5.7245.468 5.008 4.611 15 13.865 12.849 11.938 11.118 10.380 9.712 9.108 8.559 8.061 7.606 6.811 6.142 5.8475.575 5.092 4.675 16 14.718 13.578 12.561 11.652 10.838 10.106 9.447 8.851 8.313 7.824 6.974 6.265 5.9545.668 5.162 4.730 17 15.562 14.292 13.166 12.166 11.274 10.477 9.763 9.122 8.544 8.022 7.120 6.373 6.0475.749 5.222 4.775 18 16.398 14.992 13.754 12.659 11.690 10.828 10.059 9.372 8.756 8.201 7.250 6.467 6.1285.818 5.273 4.812 19 17.226 15.678 14.324 13.134 12.085 11.158 10.336 9.604 8.950 8.365 7.366 6.550 6.1985.877 5.316 4.843 20 18.046 16.351 14.877 13.590 12.462 11.470 10.594 9.818 9.129 8.514 7.469 6.623 6.2595.929 5.353 4.870 21 18.85717.011 15.415 14.029 12.821 11.764 10.836 10.017 9.292 8.649 7.562 6.687 6.312 5.973 5.3844.891 22 19.660 17.658 15.937 14.451 13.163 12.042 11.061 10.201 9.442 8.772 7.645 6.743 6.3596.011 5.410 4.909 23 20.456 18.292 16.444 14.857 13.489 12.303 11.272 10.371 9.580 8.883 7.718 6.792 6.3996.044 5.432 4.925 24 21.243 18.914 16.936 15.247 13.799 12.550 11.469 10.529 9.707 8.985 7.784 6.835 6.4346.073 5.451 4.937 25 22.023 19.523 17.413 15.622 14.094 12.783 11.654 10.675 9.823 9.077 7.843 6.873 6.4646.097 5.467 4.948 26 22.795 20.121 17.877 15.983 14.375 13.003 11.826 10.810 9.929 9.16 7.896 6.906 6.491 6.118 5.480 4.956 27 23.560 20.707 18.327 16.330 14.643 13.211 11.987 10.935 10.027 9.237 7.943 6.935 6.5146.136 5.492 4.964 28 24.316 21.281 18.764 16.663 14.898 13.406 12.137 11.051 10.116 9.307 7.984 6.961 6.5346.152 5.502 4.970 29 25.066 21.844 19.188 16.984 15.141 13.59 12.278 11.158 10.198 9.370 8.022 6.983 6.551 6.166 5.510 4.975 30 25.808 22.396 19.600 17.292 15.372 13.765 12.409 11.258 10.274 9.427 8.055 7.003 6.566 6.177 5.517 4.979 40 32.835 27.355 23.115 19.793 17.159 15.046 13.332 11.925 10.757 9.779 8.244 7.105 6.6426.233 5.548 4.997 50 39.196 31.424 25.730 21.482 18.256 15.762 13.801 12.233 10.962 9.915 8.304 7.133 6.661 6.246 5.554 4.999 Print Done