How much work is required for a 78 kg runner to accelerate from rest to a speed of 7.0 m/s

What is work? how much work is done to move an object 0 meters?

Could someone . i have tried to solve myself but my calculation is off

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.