Knitting pattern help

Knitting my first baby sweater and working on the first sleeve. I’m working on the increase by two on the knit row then p,k,p rows repeat those rows 7 times. Started with 40 sts supposed to end with 58 sts. Below is from the pattern. Was wondering if anyone would help me to this figure out in what I should do? Thank you for anyone’s help in advance!!!
Inc row K3, m1, k to last 3 sts, m1, k3. Work 3 rows.
Rep the last 4 rows 6(7:8:10) times and the inc row again. 54(58:64:70) sts. Cont straight until sleeve measures 15(17:19:21)cm/6(63⁄4:71⁄2:81⁄4)in from cast-on edge, ending with a p row. Cast off.

Welcome to KH!
If you start numbering the rows with row 1, then you would make an increase row every 4 rows: increase on rows 1,5,9,13,17,21,25,29 and 33. Then continue straight in the pattern.