A mi abuela le duelen los ojos
Answer: It looks like you just need to cut off the last vowel (and consonant if there is one) of the word.
For number one, it's "perezosísimo"
For question 2, it's "aburridísimo"
For question 3, I think you do the same but keep it plural, so "interesantísimos" I would imagine.
Answer:
un amigo
Explanation:
A friend is always there, and will be more likely to answer you or talk to you because your friend have that relationship because he / she is interested on you