Suppose Laudy (L) can paint the entire house 2.5 times faster than Nasrah (N). If they can paint the house together in 20 hours, how long will it take Nasrah if she works alone

Miguel’s teacher asks him to color 4/8 of his grid. he must use 3 colors: red, blue, and green. there must be more green sections than red sections. how can miguel color all the sections of his grid to follow all the rules