Answer : 1. "trial is valid"
Explanation :

Landing Area: 9 meters in length and 2.75 meters in width.

Take-off Board: 13 meters behind the pit (Men) and 11 Meters behind for (Women) and is white in color, 1.22 Meter length, and 20 cm in width.

Plasticine Indicator Board: Indicate foul in the long jump. The length is 1.22 Meters and the Width is 10 cm

Runway of Triple Jump: 40-45 meter

Triple jump Phases are Approach run, Take off, Hop, Step, Jump, and Landing. In Triple Jump, the white flag indicates: the trail is valid.