5. The tolerance is the amount of flexibility that it has. The higher the tolerance, the more space will be selected. Likewise the lower it is, the less space will be selected due to it being more strict about the color.
8. The ruler is used for measuring a length on a image. You use it by selecting the edge of an image and moving your mouse to the other side of the image you are measuring. The purpose of this tool is to measure the length of an image.
My opinion of the test.
This test was fair for my skills. I did fine when asked to learn on my own, although I find it easier for you to show us. My overall experience was that it was kinda stressful keeping up with the test, but I did it anyways.
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