shirpa:, I've locked this question, because I don't see it going anywhere productive. Please read and comply with the
Forum Rules{click}, we want to see your attempt. What is the reason behind what you did?
Please try to attach the images to the thread, so we can do what you have to do: quickly look at the images, all together, and make decisions. Please tells us what you did, the answer doesn't need to be an image, and not an empty white box. And then, we'll tell you, where your reasoning is incorrect, and how you can improve.
All you've done, three times, is say you're not a chemistry person. But
Corribus: points out -- you want credit for a chemistry course? And a job using these concepts possibly? If you don't stop behaving that way, no one will want to even work next to you, never mind helping you.