Please help me solve those data structure questions and give me if explanation, thanks

Assume that each int element of an array occupies 2 units of storage and each float element of an array occupies 4 units of storage. Suppose that the first element of array A is A[O]IO] or AlOj[Oj[O] and its address is 666. Please give the address of the indicated element in each of the following cases. (20%) (a) int A[81[9] with column-major order, please find element Al31[4] (b) float A(6][81[9] with row-major order, please find element A[3]171[4] 4