Electrostatic potential created by a uniformly charged rod

A straight plastic rod extends from position,

 [cm],

to position,

 [cm].

This rod is uniformly charged with a charge density $\lambda =$  × 10-6 [C/cm].

The electrostatic potential is assigned a value zero very far from the plastic rod. What is the electrostatic potential at position,

 [cm]?

$\varphi = $ [V]