Help with question 1 please

1a) . You work as a data analyst for a research company and you have just finished analyzing the data for how long it took 238 people to complete a questionnaire that consisted of 200 items on general knowledge about vaccines.It took an average of 45 minutes (st dev = 3.8) for people to finish the questionnaire. How many people finished the questionnaire in less than 46.9 minutes?

1b) When you tried the questionnaire yourself your score was 128.If your score was 2.1 standard deviations above the mean, 238 people took the questionnaire and the variance was 81, what was the mean score for the entire group?

1c. Using data from 1a and your answer from question 1b, how many standard deviations above the mean would place in the top 10% of scores?What actual score would need to be in the top 10% on the questionnaire?(If, and ONLY if, you could not complete question 1b assume the mean was 100 and the St Dev was 15 and then complete this question).

1d. Using the data from question 1a) what proportion of people took more than 39.3 minutes to finish the questionnaire?

1e.If you consider your score to be an indication of your knowledge about vaccines what type of measurement scale would it be (nominal, ordinal etc.i.e.,this is a one word answer)

1f)Justify/explain your answer to 1e.This is not a one word answer but you CAN answer it in 10 words or less and under no circumstances should it be more than one sentence.