hi

im a complete newbie, i'd like to write some MapleTA questions which involve the inverse of the Gaussian cumulative distribution function, N(x).  [N(0)=.5, N(-x)=1-N(x)].  I know maple has this function in its statistical package, but i can't figure out how to access it, apply it, or assign its output to a variable in MapleTA.  What I need, basically, is the ability to compute something like $a=N($d1) and $b=N($d2) and use these to find a numerical answer to a problem.