computer vision filters conceptual questions

you don't need to do any plotting or any coding? just logical answers they all short answers just compare with what I got?

Run GaussianBlurImage and SeparableGaussianBlurImage with sigma = 2, 4, 8 on Seattle.jpg. How many seconds does it take to run each function? How long do you think it would take to run each with sigma = 32? 2.

What is the best amount of blur to apply when down-sampling Moire.jpg by 8x (pressing Half Size 3 times)? Does down-sampling Seattle.jpg require the same amount of blur?

3. Can you find an edge in TightRope.png that is visible to the human eye, but does not have a strong response from the Sobel edge detector?

4. If you rotate the image 20 times by 2 degrees, does it produce the same result as rotating the image by 40 degrees? If not, why? Please use imrotate command in Matlab.

5. If you apply blur before applying FindPeaksImage you can remove many noisy edges. What is the best amount of blur to apply to Gogh.png to find the cleanest edges? In addition to answering these questions, please turn in your best peak edge image called GoghEdge.png.