List the elements of A B $,$ AB$,$ A $-$ B$,$ B $-$ A for the following choices of A and B $2$ List the elements of AnB, AUB, A$-$B$,$ B$-$A for the following choices of A and B$.$ a$)$ A $=[6]-[3]$ and B$=[8]-[$s$]$ B$)$ A $=[3]$u$[5]$ and B $=141062)$ c$)$ A $=[3]$n$[$e$]$ and B$=[2]-[6]$