The measurement of fog in an airport shows that the droplet size distribution of the fog may be represented by the equations: 50x15 m No(x)=0.83+0.0431n(x) 15 x4 m No(x) =0.30+0.2391ln(x) 42x0.5 m No(x) =0.21+0.304ln(x) No(x) is the cumulative fraction by number. (1) Write down the questions for no(x) for different particle size ranges. (2) What is the mean droplet size by number? (3) What is the mean droplet size by mass? (4) The specific surface area per unit volume (Sv) of the fog is the total surface area divided by the total volume, in number distribution terms (assuming spherical droplets). What is the S for the fog? (5) What is the Sauter mean diameter of droplet in the fog?