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Answer:
(a) plane NOU
Step-by-step explanation:
The points identified on plane L are {M, N, O, U}. All but point U are on the same line.
To identify the plane we need to name 3 non-collinear points. U must be one of them. The other two could by any two from the set {M, N, O}.
One possible name for plane L is plane NOU.
