4.A particle undergoes a uniformly accelerated motion on which flashes a strobe every 0.5 second. It took one minute to cover the full observation, and the distances travelled dur-ing first 0.5 s and the last 0.5 s of observation were 5 m and 241 m respectively. Deter-mine:  a) the acceleration of the particle; b) the total distance travelled during the full ob-servation; c) velocities of the particle at the beginning and at the end of observation re-spectively; the total distance the particle is expected to travel between the 5th and the 10th minutes. [10]