3i3 + 3i1 – 5iz = 7.5 i2 – 7i3 + 2i1 =- 17.5 - 10iz + 4iz + 5i3 = 16 - 1. Write the above system of equations in the form A x = b, where A is a 3 by 3 matrix and x and b are 3 by 1 vectors. 2. Find...

Please solve the last branch of the question

Extracted text: 3i3 + 3i1 – 5iz = 7.5 i2 – 7i3 + 2i1 =- 17.5 - 10iz + 4iz + 5i3 = 16 - 1. Write the above system of equations in the form A x = b, where A is a 3 by 3 matrix and x and b are 3 by 1 vectors. 2. Find the determinant of A. 3. Determine i1, iz and iz by using Gaussian elimination. 4. Determine iį, iz and iz by using the Inverse Matrix Method.