[R] Tables in Rmarkdown Word

I am relatively new to R and was wondering if someone could advise me on presenting tables in R Markdown for Word. I would like to present a simple table of counts, with column 1 representing name of an organisation (and last row called "All organisations") and another four columns representing

[R] Seasonal weekly average

five years; another line will then plot the current year, enabling a comparison of current weekly counts against a five year average for the same week. I would like some advice on how this can be done in 'R' . My data is disaggregated data - with dates in the format in 01/01/2018. Tha