import numpy as np

def m8(M,k):
    M=np.array(M)
    return M[ : ,k]

def m10(M):
    M=np.array(M)
    for i in range (0, len(M[0]), 2):
        print (M[ : ,i])

def m17(M):
    return np.sum(M), np.prod(M)

def m18(M):
    for i in range (len(M[0])):
        print ( np.sum(M[ : ,i]),np.prod(M[ : ,i]))

def m19(M):
    for i in range (len(M)):
        print (np.sum(M[i,:]),np.prod(M[i,:]))

def m24(M):
    for i in range (len(M[0])):
        print ( np.min(M[ : ,i]))

def m27(M):
    A=[]
    for i in range (len(M[0])):
        A.append( np.min(M[ : ,i]))
    print (np.max(A))

def m28(M):
    A=[]
    for i in range (len(M)):
        A.append(np.max(M[i,:]))
    print (np.min(A))