Find the magnitude and direction angle of the vector a given below. Express your answer to one decimal place.
$a=(31i-17j)-(25i-17j)$

• A. 6.0 and 0.0°
• B. 6.0 and 90.0°
• C. 6.0 and 180.0°
• D. 36.0 and 0.0°

Answer: (A)