What steps do I take to calculate, Is the normality assumption that was made at the beginning valid? (The assumption: Assume that the closing prices of the stock form a normally distributed data set )Why or why not? Hint: Does this distribution have the properties of a normal distribution as described in the course textbook? Real data sets are never perfect, however, it should be close. Please explain the steps using excel usage, I just need to learn the steps to the correct answer. Mean:1076.025 and SD 85.16081