This is computer artitecture class. please explain. thanks

i.The IEEE representation for the number 0100 0001 1011 0000 0000 0000 0000 0000 tells us that this number has an exponent plus bias value of ?

ii. The octal value of Hexadecimal 12 is

iii.The decimal value of unsigned binary 1111110 is

iv. The decimal value of binary 1100 in a 4-bit 1's complement system is

v. Decimal 4.5 has a binary value of