Given a set R with two operations and a ring, if the following eight properties are shown to be true:
1. Closure property of addition: for all a and b in R, a + b is also in R.
2. Closure property of multiplication: for all a and b in R, a * b is also in R.
3. Additive identity property: there exists an element 0 in R such that a + 0 = a for all a in R.
4. Additive inverse property: for every a in R, there exists an element t in R such that a + t = 0.
5. Associative property of addition: for every a, b, and c in R, (a + b) + c = a + (b + c).
6. Associative property of multiplication: for every a, b, and c in R, (a * b) * c = a * (b * c).
7. Commutative property of addition: for all a and b in R, a + b = b + a.
8. Left distributive property of multiplication over addition: for every a, b, and c in R, a * (b + c) = (a * b) + (a * c).
9. Right distributive property of multiplication over addition: for every a, b, and c in R, (a + b) * c = (a * c) + (b * c).
Consider the set M22 of 2x2 matrices with even integer entries. The notation Z2 denotes the set of even integers.