(1) He is a coach whose record has been amazing.

Question

a. what is the grammatical name of the sentence.
b. what is the grammatical function of the sentence.
(2) Do you remember the restaurant where we ate launch.
a. what is the grammatical name of the sentence.
b. what is the grammatical function of the sentence.
(3) Whenever i am with him, he misbehaves.
a. what is the grammatical name of the sentence.
b. what is the grammatical function of the sentence.

Answer 1

I’ll be happy to check your answers.

I'll do your first one, assuming I know what those directions mean.
1.a. complex sentence
1.b. declarative sentence (statement)

https://www.espressoenglish.net/english-sentence-structure-4-types-of-english-sentences/
and
https://www.englishclub.com/grammar/sentence/type.htm