Help with sweater pattern

[crazyknitter1]

This is my first sweater, and I'm stuck on the first row. Here is the pattern instruction for it:

Row 1 (RS) K1 (garter-st selvage), work 7 sts broken rib, [15 sts small double cable, 11 sts broken rib] twice, 27 sts large double cable, [11 sts broken rib, 15 sts small double cable] twice, 7 sts broken rib, k1 (garter-st selvage). Cont in pats as established until piece measures 20 (21, 22)"/50.5 (53.5, 56)cm from beg.

How do you do the garter-st selvage? And when it says work 7sts in broken rib, does that mean k1,p1,k1,p1,k1,p1,k1? I would greatly appreciate it if you could help me with this. Thanks