An economist collected the monthly returns for KDL's portfolio and a diversied stock index. The data collected are shown below: Month Portfolio Return (96) Index Return ('36) l .1 1 -0. 59 l 2 72.10 64.90 3 5.12 4.81 4 1.01 1.68 5 -1.72 -4.97 6 4.06 2.06