The roof convergence data for 30 days at a monitoring station in a coal mine gallery is given.

The management decides on a Trigger Action Response Plan (TARP) if the following two premises occur simultaneously.

Premise 1: Rate of convergence exceeds 1.5 mm/day between two consecutive measurements.

Premise 2: Rate of cumulative increase in convergence exceeds 1.0 mm/day.

Identify the day on which TARP is enforced in that gallery.