Audio/video Doorbell and Door Viewer

FIG. 1 is a front, top perspective view of an audio/video doorbell and door viewer according to the present design; FIG. 2 is a back, bottom perspective view thereof; FIG. 3 is a front elevation view thereof; FIG. 4 is a back elevation view thereof; FIG. 5 is a left-side elevation view thereof; FIG. 6 is a right-side elevation view thereof; FIG. 7 is a top plan view thereof; and, FIG. 8 is a bottom plan view thereof. The broken lines depict portions of the audio/video doorbell and door viewer that form no part of the claimed design that forms no part of the claimed design.