Please help with the following physics questions

(a) Explain what is meant by a vector quantity and give an example of such a quantity. [2] (a) Fig. 1.1 shows three coplanar forces acting at a common point. Find the magnitude and direction of the resultant of these three forces. [8] 20 N 300 ........ 4no 370 8 N 15 N Fig. 1.1 (a) Sketch the velocity-time graph for a body moving with (i) uniform velocity. (ii) uniform acceleration. [2] (b) State how a velocity-time graph may be used to find (i) the acceleration of a body. (ii) the distance traveled in a given time. [2] (c) A stone is thrown vertically upwards with an initial velocity of 15 m sil. Neglecting air resistance and using g as 10 m s find (i) the maximum height reached by the stone. (ii) the time taken for it to get back to its original elevation. [6]