please solve C & D together using the table under the question of bank muscat share price

c) Wse the below tabl take monthly close share price of bank muscat for year 2021, calculate: i) Monthly return ii) Average return iii) Variance iv) Standard deviation (8 Marks) d) Draw the graph of the monthly return and evaluate in terms of the fluctuation in return in year 2021 with relevant reasons. (4 Marks) (Total Marks Task B=15 Marks) Bank Muscat Share Price