Directions: Read the following information carefully and answer the questions.
Eight persons, Patrick, Xander, Jos, Carlos, Alex, Marcus, Charles and Jonny all work in the same company. All of them joined the company on the 12th or 21st of four different months,January, April, July and November in the same year but not necessarily in the same order.
Only two persons joined the company before Jos. Jonny joined the company on the 21st of the month which has 31 days. Xander and Carlos joined the company in the same month. Charles didn’t join the company in the month of April or July. No one joined the company after Marcus. Only two persons join the company in between Jos and Carlos. Jonny didn’t join the company in the months of July and November. Patrick joined the company immediately before Xander. Charles and Marcus, who are twin brothers, joined the company in the same month.