Find the number of sylow 5 subgroups, sylow 7 subgroups and sylow 2 subgroups of A5

1) Write as single cycle or product of disjoint cycles: (1234) (245)(1534)(513)

Which fraction have decimal representation that are not finite and repeat infinitely? 1 /2 ,1/3, 1/4, 1/5 ,1/6 ,1/7 ,1/8 ,1/9 ,1/10, 1/11, 1/12, 1/13, 1/14 ,1/15, 1/16 ,1/17, 1/18, 1/19, 1/20, 1/21, 1/22 ,1/23, 1/24 ,1/25 ,1/26, 1/27 ,1/28, 1/29