Question: please explain step by step that I can totally understand this question, thank you! Question 5: (a) Let M2x2 be the set of all 2

please explain step by step that I can totally understand this question, thank you!

Question 5: (a) Let M2x2 be the set of all 2 x 2 matrices. Determine if E M2x2 : a 2 0 and a E R is a subspace of M2x2. Explain your solution in words. (b) Determine if W = y ER3 : x+ 5y +2=0 is a subspace of R3. Explain your solution in words. (c) Determine if W = y ER3 : x + 5y + z =2 is a subspace of R3. Explain your solution in words

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