How to read this pattern
I need help please. I am a new starter for knitting bolero and I don't understand how to read the following pattern lines:
I casted on 126 and worked thru:
Shape Armholes: Cast off 9 sts at beg of next 2 rows..108sts. Dec one st at each end of next and foll alt rows until 92 sts rem. Work 49 rows stockings.
Shape Back Neck:
Next Row: K31, turn. Cont on these 31 sts for right side of back neck. Purl 1 row. Dec one st at neck edge in next and foll alt rows until 26 sts rem. Purl 1 row.
Shape Shoulder: Cast off 9 sts at beg of next and foll alt row.
Please help on how to read the above pattern in a easy to understand way???
What's Dec one st at each end of next and foll alt rows??
After I done the Shape Armholes, do I cast off or cont. on to Shape Back neck?
What's Dec one st at neck edge in next and foll alt rows?
Do I cont on to Shpae shoulder? and no need to cast off the pieces, just go on with cast off 9 sts? but what does it mean by Cast off 9 sts at beg of next and foll alt row???
Please help and thank you so much.