tell me the answer for 5 and 6

Question 5 1 pts You found a rock with 2 units of isotope V and 14 units of isotope A. How old is the rock in terms of half-lives? 1 half-life O 4 half-lives O 2 half-life O 3 half-lives O 0.5 half-lives Question 6 1 pts You found a rock that has undergone 2 half-life decay cycles of Isotope V. If each half-life decay cycle takes 100 million years, how old is the rock? O 300 million years O 400 million years O 200 million years 50 million years 100 million years