9. 0f the 19 employees at a gift shop, 13 work full time. i\" work on weekends. and Q are casual employees. All of the permanent part-time employees work on weekends. 3 of the full-time employees work on weekends1 4 of the casual employees work full time. and 4 of the weekend staff are casual employees. Use a 1lll'enn diagram to determine how many full-time casual employees work on weekends. [4 marks, A; 3 marks. G}