Step-by-step explanation:
The infinitives in the given sentence are:to writeto addInfinitives are verbs accompanied by a 'to' before it. The verb is the basic form ,i.e. V1 form and it is mostly in the plural form.• They are formed by verbs but behave as nouns, adverbs or adjectives.• Other examples .1. She decided to book a car for the event.2. I promise to support you forever.