Let's just say you have 1,000 cows that is experiencing an outbreak of an unknown viral disease. The cattle can transfer the disease at a rate of 0.1 and come into contact with one another at a rate of 0.002 . Fortunately, they recover after 20 days. A. Calculate RO (show your work) B. calculate the epidemic threshold (show your work) and state when will you expect to happen once the threshold is reached and why (One sentence) c. How would you define RO if this disease was caused by worms rather than a viral disease? D. You discover that the disease is SIR and decide to model it. If you don't include vital dynamics, explain in one sentence what you expect to happen and why? .