anova table by hand in r

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We have five groups and three observations per group. The group means Exercise 3.4 are 6.5, 4.5, 5.7, 5.7, and 5.1, and the mean square for error is .75. Compute an ANOVA table for these data

You only need to use R to compute ANOVA table for the problem since they only showed you the summary statistics not the data.