6. is-member? De#ine a function that takes two arguments, a list and an expression, which may be atomic or a list. Your function should return true (#t) if the element is a member of the list and false (#f) if it does not. You may not use the built-in member or element functions as helper functions. Your implementation must be recursive.

What are compression artifacts? 1) visible defects in the picture caused by the nature of the compression algorithm. 2) numbers that tell a web server how much to compress a picture for faster transmission. 3) invisible defects in the picture preserved by lossless compression. 4) numbers that tell a photo editing program how much to compress a picture for faster transmission.

10. when you create a pivottable, you need to specify where to find the data for the pivottable. is it true

What are the 12 colors of the spectrum called?