Reading a pattern help

Hi I’m reading this pattern and finding myself getting in a muddle trying to understand it can someone please help?

Beg at lower edge using the thumb method and A, cast on 9 sts.
First and next 4 foll alt rows: P.
Inc row: (Inc) to end (18 sts).
Inc row: (K1, inc) to end (27 sts).
Inc row: (K2, inc) to end (36 sts).
Inc row: (K3, inc) to end (45 sts).
Inc row: (K4, inc) to end (54 sts).
Beg with a p row, stocking-st 17 rows.

Thanks

Hi and welcome!

Beg at lower edge using the thumb method and A, cast on 9 sts.
First row purl
2. Inc row: (Inc in every stitch) to end (18 sts).
3. purl
4.Inc row: (K1, inc) to end (27 sts).
5. purl
6. Inc row: (K2, inc) to end (36 sts).
7. purl
8.Inc row: (K3, inc) to end (45 sts).
9. purl
10. Inc row: (K4, inc) to end (54 sts).
Beg with a p row, stocking-st 17 rows.
11. purl
12 knit
and continue to alternate a purl row with a knit row for 17 rows total stockinette stitch

Thank you I now understand and can carry on