Question: For each, list three elements and then show it is a vector space. (a) The set of 2 2 matrices with real entries under

For each, list three elements and then show it is a vector space.
(a) The set of 2 × 2 matrices with real entries under the usual matrix operations.
(b) The set of 2 × 2 matrices with real entries where the 2, 1 entry is zero, under the usual matrix operations.

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