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(a) The emissive power W of a blackbody, which depends on the Stefan-Boltzman constant A, and the fourth power of the absolute temperature T, and is given by W=AT4 If for a temperature of 1392R, the value of W was found to bo 6420Btuft2h1, determine the magnitude and units of A. What would be its value in units Jm2s1K4 ? Conversion Factors: 1m=3.2808ft,1h=3600s,(1K)=(1.8R),1J=9.486104BTU ( 8 marks) (b) The feed to a distillation column contains 59.1 mole\% o-xylene (MW 106.17), 5.9 mole\% m-xylene (MW 106.17) and 35 mole\% maleic anhydride (MW 98.06). By taking a suitable basis, express the compoeition of this stream in terms of mass fractions, and find the component mass flow rates (kgh1) if the total molar flow rate is 4.91kmolh1. ( 8 marks) (c) What would you plot on what kind of paper to get a straight line if experimental (x,y) data is correlated by the following function y2=ax+b1 and what would the slope and intercept be in terms of the function parameters. Suppose it has been foumd that when x=0,y=1 and when x=12,y=0.2, what would be the value of y when x=1.5 ? (9 marks)