lena is scheduling 35 part-time employees to complete a project. of those employees, 1/5 work mornings only, 10 work only afternoons, and the rest alternate between mornings and afternoons. if lena plans on using all of her morning only staff, 1/2 of her afternoon only staff, and 1/3 of her remaining staff, how many people will lena schedule? 30 23 18 24