Problem 2 (25 points) Cholesky decomposition of matrix A has…

Problem 2 (25 points) Cholesky decomposition of matrix A has been used to find U = [2   -1      0     0;         0     3    -1     1;         0     0     2     1;         0     0     0     4] Find the (a) size of A (b) determinant of A (c) skew-symmetric part of A.