Kinematics

A particle leaves the origin at t = 0 with an initial velocity vo = (3.6 m/s)i. It experiences a constant acceleration a = (-1.2 m/s2)i – (1.4 m/s2)j.
(a) At what time does the particle reach its maximum x coordinate?
(b) What is the ve­locity of the particle at this time?
(c)
Where is the particle at this time?