The following data was obtained from looking at the process dynamics of a shell and tube heat exchanger.

Focussing on the first order model fit: use the following values to predict what the outlet process water temperature(ST-3) would be after 400 seconds and 1200 seconds, given a step decrease in the cold process water flow rate(SC-2) from 1.4L/min to 0.4L/min at time = 0, and if the initial temperature of ST-3 was 40C.

Process Gain(K): -0.5271

Time Constant(T1): 80.53

Dead Time(TD): 0.2899

Is this process direct or reverse acting? How can you tell?