Andr set up a contributory pension plan for his employees as a way of recognizing their contribution to the company's success and to win ther loyalty. The employer pays 60% of the contributions and the employee. 40%. The vesting period is two years. Brigitte enrolled in the plan when she joined the company in 2016 but in 2017 left for a better job elsewhere. Which contributions did Brigitte keep when she left the company?