Which of the following MAC addresses are valid?

a$.00$:$0$c:$29$:$2$c:$3$a:gg

b$.00$:$1$b:$44$:$11$:$3$f:$0$a

c$.10-0$F$-$AC$-12-$FF$-11$

d$.24$:$5$A:$00$:FF:Z$5$:BF

e$.90$:FB:A$6$:$10$:$8$A:$25$

f$.00$:$25$:$96$:ff:cc