A stuck had returns. at I5 percent. 45 percent. 4 percent, and id percent enter the past fpur years. What is the standard deviaun at these returns? 8.5 percent re. 15 percent r- 9.0 percent 11' 19 percent F. 9.4 percent 1" Average return = {0.06 CLUE + ELEM + 11.16} 4 = [L115 1: = t" [1 {4 - 1}] [(0.05 0-05}: + {-D [SLEEP + {tt - {HIE}2 + (DIE: - DDSJII = 9.3 percent