Please help with question 14.6, for reference I'm sharing 14.5

Compositional Analysis of Petroleum Reservoir Fluids 361 14.6 1.1 lbm of monophasic bottom hole sample of a North Sea volatile oil was flashed/blown down to standard conditions (14.696 psia and 60F). The blowdown resulted in 0.33lbm of gas that had the following molar distribution (as determined by GC ), whereas the molar distribution of the oil is given in Problem 14.5. Calculate the composition of the bottom hole sample in mol-\%. 14.5 The molar distribution, based on a TBP distillation, of a C7+ fraction of a North Sea volatile oil is given in the following table. The C7+ molecular weight and specific gravity are measured as 203.73 and 0.84571 , respectively. Based on the given data and generalized pseudo fraction properties, determine the molecular weight and specific gravity of the C20+ fraction of this volatile oil