Is illegal batting directly from a punt administered as a PSK

[kdf5]

The ball will be a touchback when it crosses the goal line since it's a touchback regardless of who put the force on it. In a) the basic spot is the 20 but the bat happened at the 5 so the spot of the foul is behind the basic spot and it will be R's ball at the 2 1/2. In b) it's simply a touchback unless the bat was so flagrant that you'd call it unsportsmanlike conduct, in which case it's enforced from the succeeding spot, the 20.