43. Write your own code to perform matrix multiplication. Recall that to multiply two matrices, the inner dimensions must be the same Every element in the resulting matrix Cis obtained by: 1 Cij aikDkj So, three nested loops are required Your Function 1 function [ mat3] - mymatmult( mat1, mat2) 2 3 4. [m,n]- size( matl); [k,1] - size( mat2); 8 9 10 mat3=[]; disp('Error, can' 't multiply the matrices'); return end mat3 - zeros(m,1); 12 13 for i-1m 14 15 16 17 18 19 20 end 21 end for j- 1:1 for k 1 : n mat3(i,j)- mat3(i,j)+ mat1(i , k) * mat2(k , j); end end V Test 8 (Pretest) Return error when inner dimensions don't agree Test Code: 1 %Test for error statement 2 errtest-0; 3 try 4 mymatmult(1 2 31,1 2 31) 5 catch err if isempty(err. identifier) errtest errtest + 1; 6 %not a MATLAB-generated error statement 7 8 end 9 end 10 try 11 mymatmult([1; 2; 31,[1; 2; 3]); 12 catch err 13 if isempty (err. identifier) %not a MATLAB-generated error statement 14 15 16 end 17 assert (errtest--2, 'Return error when inner dimensions don' 't agree') 18 19 errtest-errtest + 1; end Output: Error, can't multiply the matrices Error, can't multiply the matrices