Question: 5. Programming languages are often described using an extended form of context-free grammar, where square brackets are used to denote an optional construct. For example.

5. Programming languages are often described using an extended form of

5. Programming languages are often described using an extended form of context-free grammar, where square brackets are used to denote an optional construct. For example. A BCID says that an A can be replaced by a B and a D, with an optional C between them. This notation does not allow us to describe anything but context-free languages, since an extended production can always be replaced by several conventional productions Suppose a grammar has the extended productions Convert this pair of extended productions to conventional productions Identify, from the list below, the conventional productions that are equivalent to the extended productions above A1C10D OD1E

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