Agree with Frank. As a rule of thump. The duration of the fixed rate is 75% of its maturity. The floating rate is 50% of its periodic maturity. Hint. Always look at what is the liability structure. if it float then you must receive Float. If it fixed you should receive fixed.
Negative or positive duration is still sensitive to changes in interest rates. Look at the absolute value of the duration as a means to measure “sensitivity”.