A new head grows whenever one of the other heads is chopped off—a problem Hercules solves by burning the neck-stumps & burying the immortal head. In the 3rd task, Hercules captures the sacred golden-horned stag of Artemis & brings it back alive. The 4th task is to capture a giant boar. The 5th, cleaning the stables of King Augeas in a day.
a) Golden-horned stag
b) Giant boar
c) Cleaning stables
d) Immortal head