I need a help to write a case report on the following:

Akiko Hamaguchi is the manager of a small sushi restaurant called Little Ginza in Phoenix, Arizona. As part of her job. Akiko has to purchase salmon every day for the restaurant. For the sake of freshness, it is important that she buys the right amount of salmon daily. Buying too much may result in wastage and buying too little may disappoint some customers on high demand days.

Akiko has estimated that the daily consumption of salmon is normally distributed with a mean of 12 pounds and a standard deviation of 3.2.She has always bought 20 pounds of salmon every day. Lately, she has been criticized by the owners because this amount of salmon was too often resulting in wastage.

Questions of interest:

Akiko wants to use the above information to answer the following three questions:

1.What is the probability that demand for salmon at Little Ginza on a certain day is above her earlier purchase of 20 pounds?

2.What is the probability that the demand for salmon at Little Ginza on a certain day below 15 pounds?

3.Determine the amount of salmon that should be bought daily so that it meets demands on at least 90% of the days.

I have calculated the above questions, But I don't know how to write the report. Can you please help with this?