quick distribution help please!

The figure below shows the *standard normal distribution* from statistics, which is given by the following equation.

Statistics books often contain tables such as the following (below right), which show the area under the curve from 0 to *b* for various values of *b*.

Use the information given in the table and the symmetry of the curve about the *y*-axis to find the following.

(a) http://www.webassign.net/www26/symIm...0924648699.gif =

(b) http://www.webassign.net/www26/symIm...efff8af93c.gif =

some help...