Compute the solution of the following question
Question- Monthly sale figures for a particular e-retailer tend to be normally distributed with mean equal to 150 thousand dollars and a standard deviation of 35 thousand dollars. Use the normal distribution to answer these questions:
Part 1- What percentage of monthly sales is less than 200 thousand dollars?
Part 2- What's the top 1% monthly sale figure (a.k.a. 99th percentile)?
Part 3- What percentage of monthly sale values is between 200 and 250 thousand dollars?
Part 4- What percentage of monthly sales is above 180 thousand dollars
I need assist to calculate the percentage of monthly sales.