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Could someone please help me on this problem?

**1. Homework Statement**

A particle initially located at the origin has an acceleration of a=1.00jm/s^2 and an initial velocity of V=8.00im/s

a. Find the position vector at any time t (where t is measured in seconds)

b. Find the velocity vector at any time t

**2. Homework Equations**

r=xi+yj

v=vxi+vyj

**3. The Attempt at a Solution**

I know that the velocity is the first derivative of the position vector and the acceleration is the second derivative. However, I am not given the original equation or the velocity vector. Would I use these two equations?

Would it be something like this?

a. r=xi+yj

r=8.00i+1.00j

Could someone please show me what to do or give me a hint?

Thank you in advance