what are the minimum and maximum values of the coordinates of the respective classical oscillator with a given energy E?)

In the ground state of the harmonic oscillator, what is the probability (correct to three significant digits) of finding the particle outside the classically allowed region? (Hint: what are the minimum and maximum values of the coordinates of the respective classical oscillator with a given energy E?) Look in math tables under “Normal distribution” or “Error function” for the numerical value of the integral.