A multinational corporation employing several thousand workers at its campus in a large city would like to estimate the proportion of its employees who commute to work by any means other than automobile. The company hopes to use the information to develop a proposal to encourage more employees to forgo their automobiles as a part of their commute. A pilot study of 50 randomly sampled employees found that 22 commute to work by means other than an automobile. Complete parts a and b below.

a. How many more employees must the company randomly sample to be able to estimate the true population of employees who commute to work by means other than an automobile with a margin of error of 0.04 and a level of confidence of 95%?

The company must sample ____ more employees.

(Round up to the nearest wholenumber.)