I'm confused on how to do this someone please help me

Find the number of positive three-digit even integers whose digits are among 9, 8, 7,5, 3, and 1.

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)

Amber wants to know how many blocks of each color will be needed for a tapestry on the number of 40. how many blocks of each color will she make? explain why she needs to identify a new color for this tapestry