a) 2/1; 2/2; 2/3 ; 2/4 ; 2/5 ;2/6
b) 2/7; 3/7; 4/7; 5/7; 6/7;2/6; 3/6; 4/6; 5/6; 2/5; 3/5; 4/5; 2/4; 3/4
c) 8/7; 9/7; 9/8
d) 15/5, 12/4, 9/3, 6/2, 3/1
e)D24={1,2,3,4,6,8,12,24}
1/1, 2/2, 3/3, 4/4, 6/6, 8/8, 12/12, 24/24
f) 7/1 ,14/2 ,21/3 , 28/4 ,35/5, 42/6,49/7 ,56/8, 63/9, 70/10, 77/11, 84/12, 91/13, 98/14, 105/15