The returns of Shanfari Company are as follows: Year 1 =4, Year 2=11Year3=21. Year 4= (-3). The Average Return and Standard Deviation of Shanfari Company are Select one: O a. Average Return=8.25%, Standard Deviation-6,50 O b. Average Return=6.75%, Standard Deviation=7.15 O c. None of the options O d. Average Retum-8.25%, Standard Deviation 8.87 Oe. Average Return=7.45%, Standard Deviation=8,50