5 . Some teachers use diagrams like the following, depicting a:b = c:d or - = to help their students visualize proportions: 0 a 128 6 2400 c 512 d 418 a) If a = 6 when b = 24, determine c when d = 72. b) Ifb = 2400 when a = 128, determine d when c = 512. 6. Courtney has a 3-inch by 5-inch digital photo. To make an enlargement, she has dragged the size handle on the edges of the photo to create a 6-inch by 8-inch photo. She thinks that the picture now looks distorted and has asked you to help with her project. Write a paragraph explaining to Courtney what went wrong and how the photo can be enlarged without distortion