7) 15 points] The following input buffer contains 20 keystrokes entered by the user. The input buffer pointer (indicated by Start) is positioned at the first keystroke. Read operations a-e are executed on the buffer in sequence. The pointer for any read operation starts where the previous read operation left it. After each read operation, show what value will be stored in a variable, and where the pointer will be after the read. In the input buffer: blank represents the SPACE character R represents the ENTER character T represents the TAB character a-e represent non-whitespace characters. For the value stored, use: B to represent the SPACE character N to represent nothingull R to represent the ENTER character T to represent the TAB character a-e to represent non-whitespace characters. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Start Read operation Value stored after read a) cin b) getline c) cin d) cin e) getline Buffer pointer after read * Enter a number