Hi, could you please solve this question using R? Thank you very much!

In a study to evaluate the effectiveness of a new diet, the weights of 5 women who followed this diet were recorded before and after the 1-month period. Perform a suitable ttest for the null hypothesis that the mean difference in weights before and after the diet is more than or equal to 4.5kg, against the alternative that it is less than 4.5kg. Use a signicance level of 5%. (15 marks) Women Weight Before Weigtt After m-P-DJMH