4a) Write your own python code to implement Gram-Schmidt orthogonalization. 4b) Use your code an orthonormal matrix Q whose columns provide an orthogonal basis for your 4x4 Vandermonde matrix V4. 4c) Check if QTQ = I. 4d) Compute QTV4. Describe your result. [ ]: 4a) Write your own python code to implement Gram-Schmidt orthogonalization. 4b) Use your code an orthonormal matrix Q whose columns provide an orthogonal basis for your 4x4 Vandermonde matrix V4. 4c) Check if QTQ = I. 4d) Compute QTV4. Describe your result. [ ]