Steam at 1 atm abs pressure and 100°C is condensing on a horizontal tube bank with five layers of tubes (N=5) placed one below the other. Each layer has four tubes (total tubes 4 x 5 = 20) and the 0D of each tube is 19.1 mm. The tubes are each 0.61 m long and the tube surface temperature is 97.78°C. Calculate the average heat-transfer coefficient and the kg condensate per second for the whole condenser. Make a sketch of the tube bank.