Find the common factors of the terms
(i) 12x,36
(ii) 2y,22xy
(iii) 14pq,28p2q2
(iv) 2x,3x2,4
(v) 6abc,24ab2,12a2b
(vi) 16x3,−4x2,32x
(vii) 10pq,20qr,30rp
(viii) 3x2y3,10x3y2,6x2y2z