plzz solve question 5 fast plzz and also show working steps

First find the components of the vectors using horizontal component of vector as xcos theta and vertical as xsin theta. Once you have done it for all the vectors add them up. You get the resultant vector. You have already found the x and y coordinates. Now find the magnitude using root over x square plus y square. That's the magnitude. To find the angle you can use cos theta is equal to scalar product of the resultant vector and x axis divided by product of magnitudes of the resultant vector and x axis. Hope it helps.