 Hi and welcome to the session. I am Deepika here. Let's discuss a question. In a matrix A is equal to elements are given by 2, 5, 19, minus 7, 35, minus 2, 5 by 2, 12, root 3, 1, minus 5, 17, write part 1, the order of the matrix, part 2, the number of elements, part 3, write the elements A1, 3, A2, 1, A3, 3, A2, 4 and A2, 3. Now in a matrix, if number of rows is equal to m, number of columns is equal to n, then the order of the matrix is m by n and the number of elements is equal to mn. Now Aij is an element in the ith row and gth column. This is a key idea behind our question. Let's start the solution, solution part 1, the order of the matrix. Now given matrix is equal to its elements are given by 2, 5, 19, minus 7, 35, minus 2, 5 by 2 and 12, root 3, 1, minus 5 and 17. Now here, the number of rows is, that is, m is equal to number of rows is 1, 2 and 3 and number of columns that is n is equal to 1, 2, 3, 4. Therefore, according to the key idea, the order of the matrix is 3 by 4. So the answer for this part is 3 by 4. I hope the question, this part is clear to you. Let's move to the part 2. In a given matrix, number of rows, that is m is equal to 3 and n is equal to 4. Therefore, the number of elements is equal to, that is equal to 12. Hence, the answer for this part is, that is, there are 12 elements in the given matrix. Now let's move to the part 3 of the elements A13, A21, A33, A24. Now A13 is the element line in the first row and third column. So A13 is first row, third column, this is 19. The element line in the second row and first column. So in second row, first column, we have 35. Element line in the third row, third column and this is equal to minus 5. Third row, third column, this is minus 5. The element line in second row and fourth column. Fourth column, this is second row and fourth column. Two-three is the element line in the second row, third column. So this is equal to, in second row, third column, we have 5 by 2. The answer for this part is, A13 is 19, A21 is 35, A33 is minus 5, A24 is 12 and A23 is 5 by 2. I hope the question is clear to you. Bye and take care.