this is half solution code can you please complete it. jt would be a great help. thanks

Write and axplasi CFO to implemenlation based uturntic operations. Ahro, write is Bran to parse valid arithmetri expression. (H) Cantext Free grammer is a witcun zype of farmal grammer a set of produckion ruber that soveribe all passible string in a given farmal language. Praduction sules are sumple refpesintlatiant for we the ruve replare %{ \# unelude "y. tab.h" oxtern yylexal : 1. } 1, 1. [azAZ]+{eetern10;} 1 { ratern 0 ; } { retwen yjost [0];} .1