We usually use "debrief" as a verb so I'd say "I will debrief her on Monday". The final part of that sentence is not right. I'm not sure what you're trying to say. Are you going to finish all the unfinished tasks on Monday or are you going to give her a list of all the tasks you didn't complete?
There is no need to repeat "this week" in sentence 1.
Your opening should be "Are these sentences right?"
Student or Learner