What is the cumulative area from the left under the curve for a z-score of -0.9? What is the area on the right of that z-score? Hint: You will have two answers (one for the left and one for the right).

Student's partially finished answer:

The first part is to find the cumulative area from the left under the curve for a z-score of -0.9. This means that I need to find the probability that a z-score is less than -0.9.

Show your calculations using Excel functions in the cells to the right of this text box and finish answering the problem with explanations below.