Determine the value of \(a\) and \(b\) if the given polynomial \(9v^4- 12v^3+ (a-1)v^2- (b+1)v+ 1\) is a perfect square.
 
Answer:
 
The value of \(a =\) .
 
The value of \(b =\) .
 
(Note: Insert negative sign if necessary.)