Assuming the standard format (8 bits long) control field.

Since the message exchanged is an information frame, frame type is 1 bit long and has value 0.
Also given that the Poll/Final bit is set to 0.

Since we number frames starting from 0, 6th sequential message will be frame number 5.

N(S) = frame number being sent = 5 (6th sequential message)
N(R) = frame number currently expected = 6

N(R) indicates that all frames up to "N(R) - 1" i.e. frame number 5 (6th sequential frame) have been received.

Hence, given information message's control field
----------------------------------------------------------------------
| Type - 1 bit | N(S) - 3 bits | Poll/Final - 1 bit | N(R) - 3 bits |
----------------------------------------------------------------------

will look like "0 101 0 110" .

If you consider extended format (16 bits long) control field, N(R) and N(S) will be 7 bits long and the field will look like "0 0000101 0 0000110".