Dec. 2017 Total Population 37 million Population aged 15 and over 29.9 million Employed Part-Time 3.5 million Employed Full-Time 14.9 million Labour Force Participation Rate 65.8% Table 4: Petrolia's workforce data[3 Marks] Refer to table 4. Over the course of 2018, 1.2 million people retire, 300,000 more people are employed full time than in Dec. 2017, 100,000 fewer are employed in part-time jobs than Dec. 2017, and 1.35 million new workers enter the labour force. What is the unemployment rate in Petrolia at the end of 2018? (a) 37.9% (b) 23.3% (c) 15.7% (d) 6.2% (e) 5.4%