Minimum number $= 0$ , maximum number $= 127$,
Given excess $64$ so, bias number is $64$,
Range will be $0-64=-64$ to $(127-64=63) 63$.
Here, in question given that base is $16$, so the actual value represented will be $(-1)^s ( 0.M) \times16 ^{E-\text{bias}}.$