Cоmplete the fоllоwing on the formаtion of the circle of Willis аnd the blood supply of the brаin. The internal carotid artery has two terminal branches: (1) The [BLANK-1] that supplies the medial surfaces of the frontal and parietal lobes, and (2) The [BLANK-2] that passes through the lateral fissure to supply most of the superolateral surfaces. The vertebral arteries join to form the (3) [BLANK-3], which branches into terminal branches: left and right (4) [BLANK-4]. The arteries in no. 2 and 4 are connected by the (5) [BLANK-5].