Hi. Can you please provide me the workings and answers for this question? Thank you in advance for your help :)

One of the measure for personal tness is the time taken for an individual's pulse rate to return to normal after strenuous exercise; the greater the tness, the shorter the time. Ian and Imran have the same normal pulse rates. Following a short programme of strenuous exercise they both recorded their pulse rates P at the time 2' minutes after they had stopped exercising. Imran's results are given in the table below. I 0.5 1.0 1.5 2.0 3.0 4.0 5.0 P 125 113 102 94 81 83 71 3) Find the mean and standard deviation of Imran's pulse rate. [1 mark]