with procedure help

A beam of radioactive particles travels at a speed of I .9 x 1 0' m/s. The halfLlife Of the particles is I .6ps. Determine thc half-life an outside obscr,'cr would measure for thc particles-13 marks) 2. CalculaLc the rest mass of an atomic particle, if the particle accelerator produces a velocity of 0.955c and measures a relativistic momentum of 1.25 x 10-1 s kgm/s. (3 marks) An ancient piece of bark is estimated to have originally contained 2.00 gg of carbon-14. Measurements reveal thal is currently has 0.25 pg of carbon-14. Write the beta-decay reaction tar this process and etermine its age. (4 marks)