Problem 7.23 Refer to Example 7.8. The weekly mean return and volatility of GE for the year 1999 are 0.0091 and 0.0399, respectively (see Table 1.13). The sample size for these data is n = 51 (see Table 1.19). From these data estimate the mean return and volatility of GE’s stock for:

(a) one year.

(b) one month.

(c) one quarter (13 weeks).