I am to conduct an independent samples t-test by hand for two groups of data points:

Question

group 1: 15, 15, 19, 21, 25, 25, 28, 19, 19
group 2: 13, 20, 13, 12, 16, 14, 3, 18

I have the correct answer, which is around t= 3.018
I feel like I have tried everything and still am not getting this answer when I do it by hand.