A link is provided with enough information to answer these questions regarding 1 and 2. Post (a) What it is, (b) How to calculate it, and (c) Why it may be of interest to investors. Calculate it given the annual report. Provide a couple of sentences of context for your posting (comment on trends/compare to rivals):
Profit margin on sales
The Bottom Line
https://abc.xyz/investor/static/pdf/20220202_alphabet_10K.pdf?cache=fc81690
https://www.investopedia.com/terms/p/profitmargin.asp#toc-the-bottom-line