what are the 3 routes (methods) used to produce ASPIRIN

\begin{tabular}{l|l} ProcessOptioneeringandSelection(15%) & Researchthevariousprocessingroutes(upto3routes)forthechemicalprocess.Provideabriefdescriptionofeachprocessandselectthepreferredoption.Yourchoicemustbejustifiedbasedon:theprocessconditions(processcategory[batch,continuous,semi-batch],T,P);processyieldsandefficiency;processchemistry(reactions[listallreactionsandassociatedconditions],useofsecondarymaterials[catalysts,solventsetc.]);numberandtypeofunitoperationsandtheprocesscosts(estimated). \\ \hline \end{tabular}