Assuming that you have already defined the data to r, write the r script to get the t-test for a mean difference, for the data points for these two gender groups: x1 and x2, where x1 grade scores are 1,2,3 and x2 grade scores are 4,45,65. You are testing a nondirectional hypothesis and the variances are thought to be unequal, and you specify that digits = 5