Question $1$

Find the modulus and argument $($in radians$)$ of the following complex numbers, where the argument lies between $-$ and $.$

Hint: When calculating the argument pay particular attention to the quadrant in which the complex number lies.

Input all answers to $3$ decimal places.

a$)$

$|-9-4i|=r=$ Round your answer $to3$ decimal places.

arg$(-9-4i)==$ Round your answer $to3$ decimal places.

b$)$

$|6-9i|=r=$ Round your answer $to3$ decimal places.

arg$(6-9i)==$ Round your answer $to3$ decimal places.