A composition analyzer is used to measure the concentration of a pollutant in a wastewater stream. The relationship between the measured component Cm and the actual composition C is given by the following transfer function (in deviation variable form): C(s)Cm(s)=s+1es where =2min and =4min. The nominal value of the pollutant is C=6ppm, which is the same as the nominal measured value. A warning light on the analyzer turns on whenever the measured concentration exceeds 25ppm. Suppose that at time t=0, the actual concentration begins to drift higher, following the function C(t)=6+3t, where C(t) has units of ppm and t has units of minutes. At what time will the warning light turn on