Having issues with grouping in R

I am trying to group things such as age by age range to make histograms out of it. For example I have a data set of ages that I need to group by ages 18 to 49, 50 to 64, and greater than 65. I have watched numerous videos and read many articles. Help on how to do this would be much appreciated. Thanks!


(example_df <- tibble(age = seq(from = 13, 
                                by = 4, length.out = 16)))

(df_with_bin <- mutate(example_df,
  mybin = cut(age,
    breaks = c(-Inf, 18, 49, 64, Inf)

ggplot(data = df_with_bin) +
  aes(x = mybin) +

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