Question 8 [4 marks] Suppose that a client program performs a set of push and pop operations. The program asks the client to enter a character. if the character is "R", it pops an element from the stack and print it. Otherwise the character is pushed to the stack. Which of the following sequence (s) of inputs entered by client does (do) not produce the output: 6 9 8 7 3? a) 378 96 RRRRR b) 37 R 896 RRRR c) 6 R 379 R8RRR d) 6R9R 8 R7R 3R e) 6 R 739 RRRR