A circle is inscribed in △ABC, with sides AC, AB, and BC as 8 cm, 10 cm, and 12 cm, respectively. Find the length of AD, BE, and CF.
a. AD=2√3, BE=4√3, CF=6√3
b. AD=√3, BE=2√3, CF=3√3
c. AD=4√3, BE=6√3, CF=8√3
d. AD=3√3, BE=5√3, CF=7√3