How many keywords are there in c programming language

According to the video what are some tasks petroleum engineers perform check all that apply

Think of a spreadsheet as a giant calculator spread of paper chart data collector

What questions about an audience should be asked during presentation preparation? check all that apply. what does the audience already know about the topic? how will multimedia tools inspire the audience? is the information interesting and engaging? how will this information affect the presentation? will the audience change the message’s purpose? what is likely to interest the audience?