Question 2 (15 pts) a) Write a Ruby method for extracting the digits from Quebec Heath Insurance Card ID called HID_mum that given a string str, uses regular expressions and back references to find the first valid card number in the string. A person valid health care number has 4 uppercase letters, followed by 8 digits number (e.g.: RENL18347692).The method should return the individual number as an integer value, or nil if no individual valid card number is found. Examples HID num HIDnum HID num ("SALZ 18 3 4 7 692 ("HOuN12345678 ("ChAP62148730 SA262487931") # returns 18347692 HOUN2 46 81 357") # returns 24681357 CHA62|48730") # returns nil - b) Write a Ruby program that reads the name of a text file from the command line, opens the file, reads every line of text in the file, that is a string pass it the method HID _num and prints only the lines that return an accepted number. If your text file contains the three lines above it should only give the first two returns