3. Read the following information and answer the questions which follow it:
"On average a hen linnet lays 4 eggs in a clutch, one egg per day. She will start to incubate the eggs once the
last one has been laid. She does this so that all the embryos inside the four eggs develop at the same time and all the eggs will hatch at the
same time. The eggs are incubated for 12 days.
Once they hatch, the chicks stay in the nest for 12 days before they learn to fly. When the chicks have just left the nest they are still fed
by their parents for another 21 days. As their feathers grow longer and their wings become stronger they will finally become fully independent
of their parents."