Lab 1:
 
  1. Write a C code for  matrix-vector multiplication A*b. Here A is an N by N matrix and b is a N-dimensional row vector.
  2. Using that code to compute, on our Falcon clusters, matrix-vector multiplications specified by the following parameters.
        3. Aij = i+j, bj = j, N=15
        Aij = i*j,  bj = j2, N=20
        Aij = 1/i*j. bj = j3, N=25
        i=1, ..., N
        j=1, ..., N