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5. (20pt) Consider the following SLR(1) grammar G for arithmetic expressions: E EAT E T T TMF T F F -F F (E) A +

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5. (20pt) Consider the following SLR(1) grammar G for arithmetic expressions: E EAT E T T TMF T F F -F F (E) A + - M */ F id (1) (15pt) Construct an attributed grammar, based on G, that computes the type and value of an expression assuming that id's have, form the scanner, two attributes: type, which can be int or float and val, which is a number. In any operation, if one operand is a float, then both operands are converted to float using the operation n = float(n); e.g., float(2) = 2.0; the operation can be performed only between operands of the same type. The grammar does not have to be L-attributed. (2) (5pt) Using this attributed grammar, draw a decorated parse tree for the following expres- sion: (4 + -2.0) * 3. Show all attributes and arrows indicated what attributes are used to compute each value

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