There are 12 workers in an office and the average age of all the workers is 35 \(\frac{1}{2}\) years. A new worker joins the office, the average becomes 37 years. The current age of the newly joined worker is:
1
47 \(\frac{1}{2}\) years
2
55 \(\frac{1}{2}\) years
3
55 years
4
57\(\frac{1}{2}\) years