Fill the blank please?

a-Send

b- Scatter

c-Recv

d-gather

from mpi 4py import MPI import numpy as np comm = MPI.COMM WORLD size = comm. Get_size() rank = comm.Get_rank() np.random.seed (5) x = np.random.rand (size) A = None if rank == 0: A = np.random.rand (size,size) print ("matrix A: " % A) print ("vector x: %s" % x) A_partition = np. empty (size, dtype='d') if size > 1: comm. (A, A_partition, root=0) y = np.dot (A_partition, x) y = comm. (y, root=0) else: y = np.dot (A,x) if rank == 0: print ("product : %s" % np.round(y,2))