Question: Suppose the input set Sigma as { a , b } and the language X is defined as follows: X = { s in

Suppose the input set \Sigma as {a, b} and the language X is defined as follows:
X ={s in \Sigma | s = sR},
Here sR means the reverse of s. For example, if s=bbaa, then sR=aabb.
(1) Give a context-free grammar G that describes language X. Make sure to specify G as a 4-tuple G =(V,\Sigma , R, S).

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