Dwayne and alisha both correctly graphed a standard normal curve. which of the following statements is true?

neither the means nor the standard deviations of dwayne’s and alisha’s graphs must be the same.
the means of dwayne’s and alisha’s graphs must be the same but not the standard deviations.
the standard deviations of dwayne’s and alisha’s graphs must be the same but not the means.
both the means and the standard deviations of dwayne’s and alisha’s graphs must be the same.