4. Please answer the following questions using python language.

Question 16 Which one of the following constitutes a proper email subject header for an email sent from student Mickey Student to the professor? a O A) IT109_sectionOxx_Mickey_Student OB) IT109 OC) "HI OD) should leave blank Question 17 Which of the following is not a comparison operator? O A) = OB) = O C) >= D) 90: return 'A elif score > 80: return 'B' elif score > 70: return 'C elif score > 60: return 'D else: return 'F print(grade (72)) B. OD None of the above Question 19 How to obtain the word 'ALPHA' from s = 'ALPHABETIC'? Os[4] O s[:5) O S(1:5) O s[1:6] O None of the above Question 20 Python has the following types of 'read' methods (i.e. read operations) (check all that apply): read() readline) readall) readlines() All of the above