yarn quantites required are 5, 5, 7, 7.
Small errata in chevron lace

Chevron Pattern (multiple of 12 sts + 3)
Row 1 (RS):  K2,yo, k4, sl1, k2, psso, k4, yo, k1; rep from to last st, k1.

It should be written as: K2,yo, k4, sl1, k2tog, psso, k4, yo, k1; rep from to last st, k1.