1. Chose match(es) for each given basic/extended regular expression (maybe multiple correct matches) and describe the pattern of matched string for 3), 4), 6), 11). e.g. 'ab+a' (extended regex) a) ababa b) aba c)abba dhaabbaa ejaa Answer: b,c; Pattern : The matched string should begin and end with 'a' and boccurs at least once between leading and ending 'a') Note: 1) to 5) are basic regexes: 1) 'a(ab)*a' (a)ababa (b) aaba (c) aabab (d) aabbaa (e)aa (b) a?[bc] (c) a[bc (d) a? (e) abcbc 2) a?[bc] *' (a) abc 3) '. [nd]*' (a) wind (b) window (c) end (d) good (e)will 4) ^ [a-z]+[0-9] (a) a++ (b) aa++ (c) 6+ (d) a+6 (C) aa+1 Note: 5) to 12) are extended regexes. Note: 5) to 12) are extended regexes. (c) aabab (d) aabbaa (e)aa (c) 1 (d)y (e) x++y 5) a(a/b)*a' (a)ababa (b) aaba 6) [a-z](\-[a-z0-9])+ (a)x+9 (b)x+y 7) a (bc)*z (a)azbc (b) az 8) a.*[0-9] (a)a[1 (b) *2 (c) azbcbc (d) acc (e)acz (c) ab2 (d) abc (e)aaa 9) '[a-t]+[\.\ ?!+] (a)bash! (b)c (c) Java? (d) python! (@]C++ 10) '[a-z]+[\.\ ?!]\s*[A-Z]' (hint: s matches any whitespace characters) (a)o. year (b) x?y (c) U.S. (d)Hello!HELLO (e)index?a 11) '(very\s)?(cool\s]+(good|bad) weather' (a)very weather (b) very cool weather (c) good weather (d) very cool good weather (e)cool bad weather 12) -?([0-9]|([1-9][0-9]))' (a)123 (b)-123 (C)-0 (d) -2.2 (e) 1.2 13) -?[0-9]*\.?[0-9]* (a)123 (b) -123 (c)-0 (d) -2.2 (e) 1.2