I am planning to apply h1b visa Extension.I have two dependents(wife and kid).
a) Do i have apply extension for their H4 Visa?
b) If so do i have apply along with my H1b Visa Extension?
c) If so how much will be cost for H4 Visa Extension?
d) Will be employer takes care for the cost for H4 Extension or i have to take care of the cost?