1) print the sum of three numbers 2) print the average of the three numbers optionally, you can save the results into a file "results. txt" using the redirection operator or by creating the file in the script. 4) make sure to include comment block (flowerbox) in your code. 5) sample run: -

Css3 is the latest evolution of the cascading style sheets language and aims at extending css2.1. it brings a lot of new features and additions, like rounded corners, shadows, gradients, transitions or animations, as well as new layouts like multi-columns, flexible box or grid layouts.credits to medium for making this answer credits to google for copying this answercredits to me for putting this answer on your question

Don’t know sorry if i know it later i would put it here

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