At the beginning of the month, you owned $7,000 of News Corp. $5,600 of First Data, and $7,400 of Whirlpool. The monthly returns for News Corp, First Data, end Whirlpool were 9.70 percent, -2.76 percent, and 11.83 percent. What's your portfolio return? (Do not round intermediate calculations and round your final answer to 2 decimal places.) The past five monthly returns for PG&E are -3.49 percent, 4.68 percent, 4.09 percent, 6.95 percent, and 3.90 percent. Compute the standard deviation of PG&E's monthly returns. (Do not round Intermediate calculations arid round your final answer to 2 decimal places.)