The distance-time graphs of a particle at time 𝑡 makes angle 45° with the time axis. After two seconds, it makes an angle 60° with the time axis. What is the average acceleration of the particle?

Question : The distance-time graphs of a particle at time 𝑡 makes angle 45° with the time axis. After two seconds, it makes an angle 60° with the time axis. What is the average acceleration of the particle?