A family consists of a grandmother, a mother, and two daughters. If the grandmother's name is Mary, the mother's name is Sarah, and the daughters are named Anna and Lisa, who is the mother of Anna?
If '+' represents addition, '-' represents subtraction, '×' represents multiplication, and '÷' represents division, what is the value of 8 × 4 + 2 ÷ 1 - 3?