please explain and solve the question

(Q4) The parallel combination of distillation towers is as shown in Figure Q4 (a). The reboiler and condensers of the distillation columns are heat exchanging systems. The typical arrangement of reboilers and condensers is given in Figure Q4 (a). It is evident that two independent heating and cooling streams are required for the reboiler of Column 1 and condenser of Column 2 other than the process streams. Figure Q4 (a). Schematic of a parallel combination of distillation units Instead of two independent streams, single superheated steam is recommended (as shown in Figure Q4 (b)) to handle both reboiler of Column 1 and condenser of Column 2. This design makes the process sustainable and controls the overall economics by having zero net energy corresponds to steam. (a) Write energy corresponding terms for steam for all four units, using energy balance equations. Use suitable nomenclature. Take suitable assumptions wherever it is required. (b) Give the trend of pressures and temperatures at locations i, ii, iii, and iv. Use ,=, and notations. (c) Explain the solving methodology