QUESTION 5 What is a formal language? O a. A collection of strings for which there is a derivation in some grammar. b. A way of writing programs for a computer to execute. c. The set of all lexemes in some category in a programming language. O d. A collection of strings that are accepted by some finite automaton. O e. A programming language together with a formal specification of its syntax and semantics. O f. A set of strings. QUESTION 6 What do we mean when we say a variable is free? a. It is unused in the remainder of the code in question. O b. It is not bound to a value. O c. It can hold multiple values at the same time. d. There are no references to it. e. It can hold a value of any type. O f. Its value cannot be changed.

Q: Question 3: Formally defi

A: The answer to the question is as follows.

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