I need step by step explanations and answers to these multiple choice problems?

1) Simplify the expression.

(­3 ­ – i)(2 ­ – 2i)

A) 4 + 4i

B) ­-6 + 6i

C) -6 + 2i

D) 4 – 8i

2) Simplify the expression.

(1- ­ 4i)(2 + i)

A) 4 ­ – 8i

B) -2 ­ – 7i

C) 2 ­ – 11i

D) 6 – 7i

3) Simplify the expression.

(3 ­ – 4i) ­ – (1 ­ – 4i)

A) 2 ­ – 8i

B) 2

C) 2 + 8i

D) 4

4) Simplify the expression.

(5 – ­ 2i) + (4 + 4i)

A) 11i

B) 9 + 2i

C) 9 + 6i

D) 1 + 2i

5) Simplify the expression.

i^13

A) 1

B) -1

C) i

D) -i

6) Simplify the expression.

A) 8ix^2

B) 8i^2x^2

C) -8x^2

D) -8ix^2

7) Simplify the expression.

A) 9

B) -9

C) 9i

D) -9i