if you're not tired of questions, i just have (hopefully) one more... this part of the pattern confuses me:
"R5: (k1 p1) 3 times, k4, p2, k9, p2, k4, (p1 k1) 3 times.
R6: (k1 p1) 3 times, k1, p3, k2, p9, k2, p3, k1, (p1 k1), 3 times."
what is the purpose of alternating between 3 and 4 stitches on the rib? thank you so much for all of your help.