How to do this qn? help

QUESTION 3 (25 marks) A gas stream, which contains air and water vapour, is at 75 C, 1.1 atm and 70 % relative humidity. It has a flowrate of 1.5 m3/h and enters a condenser where it is cooled isobarically. (a) Draw a fully labelled process flow diagram. Indicate clearly all information related to the streams. (4 marks) (b) Determine the temperature at which the inlet gas stream begins to condense. (5 marks) (c) If the outlet gas stream contains only 10 % of the water originally present, find the molar flow rates (mol/h) of the outlet streams. (10 marks) (d) Calculate the temperature of the cooled gas stream. (6 marks)