Exercise

1. Create the following objects:
   • scalar a that contains the number 2
   • matrix A with 4 rows and 4 columns and all the elements being 2
   • matrix B of the same dimension, which has the value 2 on the diagonal and 0 otherwise.
   • Display scalar a, matrix A and matrix B.
2. Do the following computations:
• Multiply the scalar with matrix A and store the result in matrix C
• Calculate the sum of matrix C and the inverse of matrix B and store it in matrix D
• Combine matrices A, B, C and D into one 8x8 matrix E
• Create a vector b that contains the first, third and fifth element of the first row of E
• Display matrix C, matrix D, matrix E and vector b.