Suppose the returns on long$-$term corporate bonds are normally distributed. Based on the historical record, what is the approximate probability that your return on

$2$ these bonds will be less than $-2\mathrm{.}1$ percent in a given year? What range of returns would you expect to see $95$ percent of the time? What range would you expect to see $99$ percent of the time?

$3$

$4$

Input area:

$\backslash$table$[[$Average return,$6\mathrm{.}40\%,\}],[$Standard deviation,$8\mathrm{.}50\%,],[$Return less than,$-2\mathrm{.}10\%,]]$

$($Use cells A$6$ to B$8$ from the given information to complete this question. You must use built$-$in Excel function to answer this question.$)$