$(10$pts$)$ Consider an ISA that uses $26-$bit instructions, rather than the typical $32$ bits, and which has an

$1$w instruction that is encoded as

Op code

Funct

Destination Reg

Base Reg

Immediate

The Op code field is $3$ bits, Funct is $3$ bits, and the register file has $64$ registers. If the Immediate field is a signed number, what is the range of numbers that can be specified by this field?