Solar radiation is incident on a flat-plate collector at a rate of 450 W/m2. The product of transmissivity and absorptivity is τα = 0.85 and the heat loss coefficient of the collector is 4.5 W/m2∙oC. The ambient air temperature is 10oC. The collector temperature at which the collector efficiency is zero is
(a) 95oC
(b) 104oC
(c) 112oC
(d) 87oC
(e) 73oC