Determine the truth value of the following conditionals and biconditionals.
1. If x is an even integer, then x2 is an even integer.
2. If all frogs can dance, then today is Monday.
3. If 4 < 3, then 8 = 8.
4. x2 = 9 if and only if x = 3.
5. 4 = 7 if and only if 2 = 3.
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