You are asked to compare two different ways of parallelizing the SAXPY loop using the pthread library. SAXPY is a function within the standard Basic Linear Algebra Subroutines (BLAS) library and stands for "Single-Precision AX Plus Y." The implementation is very simple, involving a combination of scalar multiplication and vector addition. The routine takes as inputs two vectors of 32-bit floating-point values x and y with n elements each, and a scalar value a. It multiplies each element x[i] by a and adds the result to y[i]. The serial implementation looks like this