5 A particle is projected at an angle of \(\theta ^ { \circ }\) below the horizontal from a point at the top of a vertical cliff 26 m high. The particle strikes horizontal ground at a distance 8 m from the foot of the cliff 2 s after the instant of projection. Find

1. the speed of projection of the particle and the value of \(\theta\),
2. the direction of motion of the particle immediately before it strikes the ground.