Match List I with List II and choose the correct option.

List 1

1. Particle crosses the same height at times t₁, t₂

2. Speed at either crossing of that height

3. Total flight time T for return to launch level

4. Average speed over complete flight

List 2

1. u/2

2. g(t₂-t₁)/2

3. g(t₂-t₁)²/8

4. u=gT/2