8. What premises and what rule of inference was used in each of the three lines of the proof, below? The premises are:

(a) SnowingNow

(b) Depth4+Inches

(c) SnowingNow TravelDangerous

(d) Depth4+Inches NoParking

(f) TravelDangerous NoParking SchoolClosed

Proof:

(g) TravelDangerous // Premises used? Rule used?

(h) NoParking // Premises used? Rule used?

(i) SchoolClosed // Lines used? Rule used?