Verify whether the following compound propositions are tautologies or contradictions or contingency ((p→q)∧(q→r))→(p→r)

Verify whether the following compound propositions are tautologies or contradictions or contingency $((p \to q) \land (q \to r)) \to (p \to r)$

Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!

p	q	r	p→q	q→r	(p→q)∧(q→r)	(p→r)	(p→q)∧(q→r)→(p→r)
T	T	T
T	T	F
T	F	T
T	F	F
F	T	T
F	T	F
F	F	T
F	F	F