1.What will be matched by the following regular expressions? 1. x* 2. [0-9]\{3\} 3. xx* 4. [0-9]\{3,5\} 5. x\{5,\} 6. ^\... 7. x\{10\} 8. 9. [0-9]* [A-Za-z_][A-Za-z_0-9]* 0. ^Begin$ 1. [0-9][0-9][0-9] 2. ^..*\1$
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