Suppose that Transitia, a transition economy, grows at 8% each year and Developam, a highly developed economy, grows at 4% a year. If Transitia has a GDP of $5 billion and Developam has a GDP of $40 billion, how long would it take before Transitia has the same GDP as Developam? Select one: a. Never b. 18 years c. 36 years d. 54 years e. 72 year