Correct:
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Using 3.75 mm needles, cast on 117[127:139:147] sts.
Row 1 (rs): K1, *p1, k1; rep from * to end.
Row 2: P1, *k1, p1; rep from * to end.
These 2 rows form k1, p1 rib.
Cont in rib until work measures 7 cm (2¾ in) ending with a rs row.
Inc row (ws): Rib 3[4:6:2] sts, M1, (rib 4 sts, M1) 28[30:32:36] times, rib 2[3:5:1] sts. 146 [158:172:184] sts.
Change to 4.5 mm needles.