A 70-year-old female presents with sudden onset paralysis in her right foot and leg. Her right arm and hand are lightly affected. She does not have aphasia or visual field deficit. Over the course of weeks, she is found to have loss of bladder control, abulia, and lack of spontaneity. Which vascular area is most likely affected?
1) Anterior cerebral artery
2) Middle cerebral artery
3) Posterior cerebral artery
4) Vertebral artery