Write an attribute grammar based on the CFG of Figure 4.11 that will build a syntax tree with the structure described in Figure 4.14.

Figure 4.11:

Figure 4.14:

program stmt list $$ stmt list + stmt list decl | stmt list stmt | e decl int id real id stmt id := expr | read id write expr + term | expr add op term factor | term mult op factor xpr term factor + ( expr ) | id | int_const | real_const | float ( expr ) | trunc ( expr ) add-op +| - * | / mult_op