'Q' will be the first part of the given sequence as it is in continuation with the previous statement which is clearly indicated from the words, 'in that capacity'. 'P' will come next as it begins with the introduction of the subject in the previous statement. 'S' will follow next as it further adds to the description of the subject mentioned in the previous statement. 'R' will come at the end as it describes the feeling of the speaker after the actions in the previous statements took place. Hence, QPSR is the correct sequence. Thus, option (a) is correct.