Repeat Exercise 3 using single-precision arithmetic on a computer.
In Exercise 3
a. Solve the linear system using Gaussian elimination with three-digit rounding arithmetic.
b. Solve the linear system using the conjugate gradient method with three-digit rounding arithmetic.
c. Does pivoting improve the answer in (a)?
d. Repeat part (b) using C−1 = D−1/2. Does this improve the answer in (b)?