Relative velocity

A dog and an ant are approaching towards some yummy food. A dog runs towards the yummy food from the south with a speed of 3.04 m/s. An ant meanwhile
approaches the food from the east with a speed of 0.683 m/s.

What is the relative velocity(speed and in what direction?) of the ant as measured
by the dog?

I know the speed is 3.11578 m/s, but couldn't figure out the degree of
angle for direction, it's either south of east, north of west, north of east,or south of west,
thanks for help!