$34.$ Let A $=\{$a$,$ b$,$ c$\},$ B $=\{$x$,$ y$\},$ and C $=\{0,$ l$\}.$Find

a$)$ A $\backslash$times B $\backslash$times C$.$

b$)$ C $\backslash$times B $\backslash$times A$.$

c$)$ C $\backslash$times A $\backslash$times B$.$

d$)$ B $\backslash$times B $\backslash$times B$.$