Regex

In the questions below, "matches" refers to whole-string matching (and not to matching a substring). 1. Which of the following matches regex /abababa/? 1) abababa 2) aaba 3) aabbaa 4) aba 5) aabababa 2. Which of the following matches regex /ab+c?/? 1) abc 2) ac 3) abbb 4) bbc 3. Which of the following matches regex /a. [bc]+/ ? 1) abc 2) abbbbbbbb 3) azc 4) abcbcbcbc 5) ac 6) asccbbbbcbcccc 4. Which of the following matches regex /abcxyz/ ? 1) abc 2) xyz 3) abcxyz