() According to the following T-composition dingram (Fig. 3). please evaluate the number of theoretical plates required to obtain a solution containing 90% trans-1.2-dichloro-ethene from a solution containing 10% trans-1,2-dichloro-ethene using distillation. (3%) (1) If A and B are completely miscible in the liquid state and completely immiscible in the solid state, according to the cooling curves for their mixture at various molar ratios (Fig. 4). plot the temperature-composition phase diagram and label the phase regions. (6%) 540 300 3520 Two-phase region 310 TIK 3440 3400 Vapor Soud One-phase region 0 20 40 60 80 100 Wia They Weight percent 3240 Liquid Fig 1 Fig. 2 3200 0 0.2 0.4 0.6 0.8 10 2-Butanone trans-1.2-chloro-chen Fig 3 temperature temperaturo A A/B AB3/2 A/B-2/3 A/B-114 B time Fig. 4