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**Sundae** Hiya, need help with this as i dont know how to find resultant force of more than 2 forces.

Q) Forces P, Q and R act on a particle at O in the plane of the coordinate axes Ox, Oy. Force P acts along Ox, Q acts along Oy, and R acts at an angle a with Ox, in the first quadrant. Calculate magnitude of the resultant force and angle it makes with Ox.

P = 3N, Q = 4N, R = 5N, a = 60 degrees

I would really like if someone can draw diagrams too, any help will be appreciated.

thx.