Required information Consider the following symmetric system: 9 20 157 50 20 80 50 250 15 50 60 C3 100 Use the obtained function to to determine the Cholesky factorization of a symmetric matrix without pivoting. Also use the built-in function chol to confirm that the obtained function is working properly. (Round the final answers to four decimal places.) 6.6667 b The solution = 0 C 2.7951 O 0 d The value of a is The value of b is The value of c is The value of d is