The discrete probability function for the countably infinite sample space S = {1, 2, 3, …} is: ; x = 1, 2, 3, …… a- Find the constant "C" so that P(x) is valid discrete probability function. B- Find the probability that the outcome of the experiment is a number less than 4.

Consider a 1.2 meter high and 2 meter wide glass window whose thickness is 6 mm and thermal conductivity is 0.78 w/m °c. the room temperature is maintained at 24 °c, while the outdoor temperature is -5 °c. the convective heat transfer coefficients on the inner and outer surfaces of the window are 10 w/m2 °c and 25 w/m2 °c respectively. (a) draw the thermal resistance network, etermine the steady rate of heat transfer t e glass window (c) determine the temperature of the inner surface of the window