Load the positive definite sparse matrix from the software distribution. Let be a random vector0 and use cg to approximate the solution to Using the same tolerance and maximum number of iterations,...

Load the positive definite
sparse matrix
from the software distribution. Let

be a random

vector
₀

and use cg to approximate the solution to

Using the same tolerance and maximum number of iterations, approximate the solution using precg. Compute the residual for each iteration.