What effect does time have on the speed of a moving object

Will you chech and finish these for me, because i am stumped with them.

Gordon is going for a run through the park, but it is cold outside. the low outside temperature could affect his personal safety.

Aparticle moves in the xy plane with constant acceleration. at time zero, the particle is at x = 6 m, y = 8.5 m, and has velocity ~vo = (9 m/s) ˆı + (−2.5 m/s) ˆ . the acceleration is given by ~a = (4.5 m/s 2 ) ˆı + (3 m/s 2 ) ˆ . what is the x component of velocity after 3.5 s? answer in units of m/s.