$1.$ Eliminate all useless, unit and $\backslash$epsi $-$productions from the following grammar:

S $->$ aAa $|$ bBC

A $->$ B $|\backslash$epsi

B $->$ b

C $->$ S $|$ c $|\backslash$epsi

$2.$ Eliminate all useless, unit and $\backslash$epsi $-$productions from the following grammar:

S $->0$A$0|01$B

A $->0$D $|1$D

B $->10$A $|\backslash$epsi

C $->$ A$00|0$B$0$

D $->0|\backslash$epsi