Hi, can you explain this to me please?

Question 2. The monthly stock return of IBM is normally distributed with mean {LEE and standard deviation DIM. 1. Let X denote the monthly stock return of IBM. We have I ~ Nijux = Blithe; = {104). Compute the probability that the stock return equals iii-DE. 2. What is EUI')? What is Form)? What is E'lr'Ut'}? 3. What is the probability that the stock return higher is than CLUE? Do not use the 2- table. 4. What is the probability that the stock return is lower than [1113? Do not use the Z- table. 5. Use the 2 table to compute the probability that the stock return is higher than :11. Verify your answer in Excel. 5. What is the probability that the stock return is lower than CLUE? II..-'erif1..r your answer in Excel. i'. What is the probability that the stock return is between [1.04 and t}.t'i?? 3. What is the probability that the stock return is between 0.09 and 1.12