J.' ldUIC UCIUW bllUWb LIIC lllbLUllLdl [BLUIIIb IUI LUlllpdllICb H, D dllU L I--- I--- I--- I--- I--- .--- .--- .--- .--- .--- I--- 1. Estimate the average return and standard deviation of each company. 2. Estimate the correlations between Company A and B, A and C, as well as B and C