I made a few mistakes on the paper. Here is what the instructor wrote and I need help on:

My assignment does have several incorrect problems (3, 4, 5, and 6).  Here are the instructions followed by what I have done and just need tweaked. 

 Instructions:

Competency

Demonstrate the use of the normal distribution, the standard normal distribution, and the central limit theorem for calculating areas under the normal curve and exploring these concepts in real life applications.

Instructions

Student Profile

Frank has only had a brief introduction to statistics when he was in high school 12 years ago, and that did not cover inferential statistics. He is not confident in his ability to answer some of the problems posed in the course.

Concept Being Studied

Finding areas and probabilities by using the standard normal distribution.

As Frank's tutor, you need to provide Frank with guidance and instruction on a worksheet he has partially filled out. Your job is to help him understand and comprehend the material. You should not simply be providing him with an answer as this will not help when it comes time to take the test. Instead, you will be providing a step-by-step breakdown of the problems including an explanation on why you did each step and using proper terminology.

What to Submit

To complete this assignment, you must first download the worksheet, and then complete it by including the following items on the worksheet:

• Incorrect Answers
  • Correct any wrong answers. You must also explain the error performed in the problem in your own words.
• Partially Finished Work
  • Complete any partially completed work. Make sure to provide step-by-step instructions including explanations.
• Blank Questions
  • Show how to complete any blank questions by providing step-by-step instructions including explanations.

Your step-by-step breakdown of the problems, including explanations, should be present within the word document provided. You must also include an excel workbook which shows all your calculations performed.

My previous work is in the file box.