Matlab coding problem. What needs to be changed here to pass all the pretests?

Here is my coding and the error message.

Your Function 1 function [V_mp, V_mp_residual] - student_solution(T, v_oc, v_ mp_guess, es) 2 3 q1.6022e-19; 4 k_B 1.3806e-23; n = length (T); 7 options - optimset('Tolx',es); for i = 1:1:n le fun = (@)(x) exp(0%/(k-B*T(1)))"(1+4*x/(k-B *T(1)))-expCq"V OC/ (k-B*T(1))); 11 12 V, mp (i) = fzero(fun, x0, options); 13 V-mp-residual(1)=fun (V-mp(1)); 14 end 15 16 end xo = V mp-guess(1); Test 3 (Pretest) Index exceeds the number of array elements (1). Error in student_solution (line 12) x0 V_mp_guess(ii); Error in Test3 (line 5) [student_sol1, student_so121 student_solution(260:2:320, 0.6, 0.6, 1e-8) Test Code: 1%third test case (vector input, checking root estimates and residual 2 %values) 3Ty-correcti, y_correct2] PA3-solar(260 : 2: 320, o.6, 0.6, 1e-8); 4 [y_correct1_alt, y_correct2_alt] - PA3_solar_alt (260:2:320, 0.6, 0.6, 1e-8) 5 [student_sol1, student_sol2] - student_solution (260:2:320, 0.6, 0.6, 1e-8); 6 test vector length 7 assert(isequal (size (student_sol1),size( y_correct1)), 'output 1 should be a 31x1 column vector for this test case 8 assert(isequal(size(student_sol2),size( y_correct2)), 'output 2 should be a 31x1 column vector for this test case') 9%test accuracy 10 test1max (abs((y_correct1 - student_sol1)./y_correct1)) 11 assert(le(test1,1e-7), 'One or more values in output 1 is numerically incorrect') 12 test2max (abs (y_correct2 - student_sol2)./y_correct2); 13test2-alt-max(abs((y-correct-alt - student-so12) ./-correct2alt)); 14 assert(test23-1e-4 test2 alt