How do you identify addresses in binary and decimal notation based on their class?

Class

First Byte in Binary

First Byte in Decimal

A

$0$xxxxxxx

$\_\_\_\_\_\_\_\_\_\_$

B

$10$xxxxxx

$\_\_\_\_\_\_\_\_\_\_$

C

$110$xxxxx

$\_\_\_\_\_\_\_\_\_\_$

a$)0,1-127$; $10,128-191$; $110,192-223$ b$)1,128-192$; $01,64-127$; $101,192-255$ c$)0,1-126$; $10,128-191$; $110,192-223$ d$)1,1-127$; $11,128-192$; $100,192-255$