A force of 6N points to the upper right making an angle of pi/4 with the y-axis. the force acts on an object that moves along the ling segment from (1,2) to (5,4)

a) find a formula for the force vector

F = <6 cos pi/2, 6 sin pi/4> = < 3sqrt{2} , 3sqrt{2}> ??

b) find the angle between the displacement direction D = <4,2> and F

I know what to do given I have the correct F [ the dot product over the product of magnitudes]

c) Find the work?

again I need the right F, I know work is the dot product