The following questions relate to base conversion. You must show your work to get graded.

a$)$ Convert $25110$ to Binary.

b$)$ Convert the binary result from $($a$)$ to Octal.

c$)$ Convert the $8-$bit signed binary integer number $101001102$ to decimal.

d$)$ Convert the $8-$bit signed binary integer number $001001102$ to Hex