Could you please correct my answers for the following questions?

14) ABCD is a square of side length 3 cm.

a) State whether each statement is true or false. Explain.

1. False because it's not parallel

2. False because it's not parallel

3. True because they are the opposites of one another

b) Calculate the magnitude of AC.

4.24 cm

16) Explain your answer to each question.(Each of the letters suppose to have an arrow on the top pointing to the right)

a) If u = v, is it always true that |u| = |v|?

It's true because they are equivalent vectors.

b) If |u| = |v|, is it always true that u = v?

It's true because they are equivalent vectors.