Using the data provided $....$ a$)$ What is the composition of the very first bubble vaporized in this process? Mole fraction of light component yA $=$ b$)$ What is the composition of the last bubble vaporized in the process? Mole fraction of light component yA $=$ c$)$ What is the composition of the residue remaining in the still, Mole fraction of light component xA $=$ d$)$ What is the average mole fraction of the distillate? yavg $=$ If a model assuming constant volatility is used $...$e$)$ What is the composition of the residue remaining in the still, Mole fraction of light component xA