Help with number 13 please :))

(98 points) i need with 5 questions. answer definitions are welcomed, but not necessary.

Let the closed interval [a , b] be the domain of function f. the domain of f(x - 3) is given by (a) the open interval (a , b) (b) the closed interval [a , b] (c) the closed interval [a - 3 , b - 3] (d) the closed interval [a + 3 , b + 3]

Explain how you can use the associative property to evaluate (7x50)x4.