Tolong dijawab penting no. 1.

1] a) (a,b,c) : ( )
{(a)(b)(c)}
{(a,b)(a,c)(b,c)}
{(a,b,c)}
Jumlah himpunan bagiannya 8
b)(a,b,c,d) : ( )
{(a)(b)(c)(d)}
{(a,b)(a,c)(a,d)(b,c)(b,d)(c,d)}
{(a,b,c)(a,b,d)(a,c,d)(b,c,d)}
{(a,b,c,d)}
Jumlah himpunan bagiannya 16
c)(r,s,t,u) : ( )
{(r)(s)(t)(u)}
{(r,s)(r,t)(r,u)(s,t)(s,u)(t,u)
{(r,s,t)(r,s,u)(r,t,u)(s,t,u)}
{(r,s,t,u)}
Jumlah himpunan bagiannya 16
d)(4,5,6,7,8) : ( )
{(4)(5)(6)(7)(8)}
{(4,5)(4,6)(4,7)(4,8)(5,6)(5,7) (5,8)(6,7)(6,8)(7,8)}
{(4,5,6)(4,5,7)(4,5,8)(4,6,7) (4,6,8)(4,7,8)(5,6,7)(5,6,8)(5,7,8)(6,7,8)}
{(4,5,6,7)(4,5,7,8)(4,6,7,8) (5,6,7,8)}
{(4,5,6,7,8)}
Jumlah himpunan bagiannya 31
e)( ) : ( )
Jumlah himpunan bagiannya 1

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