I need help with this program. I am able to get rowise totals and averages but I am not able to get columnwise totals and averages. When you fix the code for columnwise totals and averages, please provide a line by line explanation of the loop required to get the columnwise total and average. Please use inline comments if you have to. I don't just need the solution, but I also need the explanation.

/*2D Arrays- //Write a program that displays the grades and average for 4 students in 5 tests in a tabluar format

Output should looks like this just as I would see in an excel sheet:

Test1 Test2 Test3 Test4 Test5 Average

Student 1:

Student 2:

Student 3:

Student 4:

Average :

*/

#include

#include // Required for srand() and rand() functions

#include // Required for time() function

#include

#include

using namespace std;

int main()

{

const int SIZE = 7;

string titleArray[SIZE] = { " ", "Test1", "Test2", "Test3", "Test4", "Test5", "Average" };

//Now these elements from the list are stored in the titleArray. All I have to do is display them using a for loop with a space between them

for (int i = 0; i < SIZE; i++)

cout << titleArray[i] << " ";

cout << endl;

const int row = 4, col = 5;

int gradesArray[row][col];

srand(time(NULL));

double sum = 0.0, average = 0.0;

for (int i = 0; i < row; i++)

{

cout << "Student " << i << ": ";

for (int j = 0; j < col; j++)

{

int randNum = (rand() % (100 - 0 + 1)) + 0;

gradesArray[i][j] = randNum;

cout << left << setw(5) << gradesArray[i][j] << " ";

sum = sum + gradesArray[i][j];

}

average = double(sum) / col;

cout << setprecision(2) << fixed << showpoint;

cout << left << setw(5) << average;

cout << endl;

//Reset both sum and average to 0

sum = 0;

average = 0;

}

cout << "Average : "; //This will print the 1st item of the very last row

//Now we will compute columnwise sum and average

cout << setprecision(0) << fixed;

double total = 0.0, avg = 0.0;

for (int j = 0; j < col; j++)

{

int i;

for (i = 0; i < row; i++)

{

total = total + gradesArray[i][j];

}

for (int k = i; k < j; k++)

cout << left << setw(5) << total;

}

cout << endl << endl;

system("pause");

return 0;

}