First is Bobby and let me check for the second one
The manner in which action is presented indicates “VERB MOOD”
Answer:
James Thurber uses many made-up words in "The Secret Life of Walter Mitty," but only two or three seem to qualify as examples of onomatopoeia, which is the creation of words that imitate natural sounds.
Explanation:
The pocketa-pocketa-pocketa sound increases because Mitty is unconsciously pressing harder on the accelerator.
Triumphantly is an adverb, so you would be looking for the verb that it modifies. I would choose the word “pressing.” Ask yourself, “how did he press down the alarm knob?” He pressed it triumphantly.