Michelle drove 3 hours longer than Timoty at an average speed 2 kilometers per hour faster than Timoty. Wulan drove 6 hours longer than Timoty at an average speed 4 kilometers per hour faster than Timoty. If Michelle drove 70 kilometers more than Timoty, then how many more kilometers did Wulan drive than Timoty?
Following chart shows experience (in years) for employees working in an organization. Employees with experience of 6 years and above are considered senior staff, while rest are considered junior staff. Find the number of junior staff in the organization.