4. Uncle Derek owns a small cattle ranch with 50 cows as of January lst. To expand his business, he brings in 20 bulls to increase the population. In the course of the year, 10 calves were born, 2 died and 5 had to be taken out to be treated for illness. Using the UAE concept, you just learnt, compute the nal number of cattle at the end of the year. Identify all the terms (Input, Output, Final, Initial, Generation and Consumption) [30] Correctly identify each term in UAE = 5 points (6 terms it 5 points/term = 30 points)