Answers to Puzzle Contest #4

I would like to congratulate @doughtaker for being the first person to provide all the right answers to this contest. I would also like to congratulate the following people for also providing the correct answers.

@gusvzla
@rksumanthraju
@ratticus
@artpitpaliwal
@singhrajat
@josediccus
@wilramos
@firemanvishal
@nee

Unfortunately, only the first person to provide all the correct answers wins the 10 SBD.

I would also like to thank the following people for participating in this contest.

@thatindianlady
@skreza
@googlee
@believeme
@ponts
@gotgame
@wovlou
@funatoz
@rufans
@enjieneer
@readarthurss
@mikel2la1
@mr-aaron
@marshalllife
@welcometonepal

Here are the answers and explanations for all 4 questions.

Question 1

Question 2

Question 3

Question 4

I will be starting another contest tomorrow.