If Quotient ring is complete local is the ring complete local?

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Let R be a Noetherian commutative ring and N the nil radical.

Given R/N is a complete local ring, is R also a complete local ring?

If R had two maximal ideal m and n then m+N and n+N are maximal ideals in R/N and that gives a contradiction.

How do I solve the completeness part?

What happens if I drop the Noetherian criteria?