A manager is scheduling employees for the weekend. The employees are Matt, Natalya, Oskar, Penelope, and Ramon. Three employees are scheduled for each of Saturday and Sunday, one for the morning shift, one for the afternoon, and one for the evening. Oskar only works one shift, and it's later than Penelope's first shift. Ramon works Saturday morning. Matt only works in the evening.
If Natalya works Sunday morning and afternoon, when must Penelope work?
Saturday afternoon
Ramon is Saturday morning. Natalya is Sunday morning and afternoon. That leave Saturday afternoon and evening, and Sunday evening. Oskar can't work until Penelope's worked, so he can't work Saturday afternoon. Matt only works evenings, so that means that Penelope must work Saturday afternoon.