syntactic analysis - Missing subject in the sentence

Original sentence:

Inform John that you have completed the tutorial and need your assigned mentor.

Is that grammatically correct, or it's misses an additional you:

Inform John that you have completed the tutorial and you need your assigned mentor.

Answer

This is called conjunction reduction, where the conjunction (and) allows the sentence fragments identified by the noun clause (that you) to be reduced.

The unreduced form is:

Inform John that you (have completed the tutorial) and that you (need your assigned mentor).

and the reduced form is:

Inform John that you (have completed the tutorial and need your assigned mentor).

Both of these are grammatically correct.