Two particles 1 and 2 are projected simultaneously with velocities v 1 ​ and v 2 ​ , respectively. Particle 1 is projected vertically up from the top of a cliff of height h and particle 2 is projected vertically up from the bottom of the cliff. Find the time of meeting of particles, if the bodies meet (a) Above the top of the cliff, (b) Between the top and bottom of the cliff, and (c) below the bottom of the cliff, find the time of the meeting of the particles.