Still don't understand foll

ok can anyone tell what this means? I am near the end of my knitting project and am anxious to finish. I am making a baby outfit and choose the middle size to knit.

cast on 22 sts.
working in st-st throughout inc 1 st at each end of 5th and every foll 8th,(4th:6th) row to 26 (26:32) sts.

does this mean inc a sts at ech end for the 4th and 5th row only?

Inc 1 st at each end of every foll 10th(6th, 8th) row to 28(32:34) sts.

I have no idea what this means. Could anyone explain?

cast on 22 sts. working in st-st throughout inc 1 st at each end of 5th and every foll 8th,(4th:6th) row to 26 (26:32) sts.

*Inc 1 st at each end of the 5th and 9th rows to end with 26sts.

Inc 1 st at each end of every foll 10th(6th, 8th) row to 28(32:34) sts.

*Then, inc 1 st each end of the 15th, 21st and 27th rows to end with 32sts.

jeeze again why the heck don’t they just write that. Thank you so much, now i can continue and finish this. I am so excited to put it all together.

Cause it’s a lot longer to write it out for each size…