A: Probably not as valuable as you'd think. First of all, John F. Kennedy wrote Profiles in Courage, not Robert F. Kennedy.
Second, it's not much of an autograph. It says "Rodly L Kinnn" then stops. And there's all that blood. Asking him for an autograph at the moment of his assassination may have seemed like a good idea at the time, but now it's kind of creepy.
Really, really creepy.
This is the creepiest antique we've ever appraised on Antiques Roadshow. I don't want to see what's in the rest of your bag.
Particularly the part that's moving.