A stream of air flowing at $45\frac{m^3}{m}in$ at $42C$ and $40\%$ relative humidity is cooled to $7C.$ Find

a$.$ the temperature at which water starts to condense $25\mathrm{.}5C$

b$.$ the total rate at which water condenses, in $k\frac{g}{m}in0\mathrm{.}71k\frac{g}{m}in$

c$.$ the rate of heat transfer from the stream, in $k\frac{J}{m}in-3600k\frac{J}{m}in$