The ornamental design for a computerkeyboard and mousetray assembly, substantially as shown and described.
FIG. 1 is a perspective view of a computer keyboard and mouse tray assembly, as supported from respective arms of a chair;
FIG. 2 is a perspective view of the computer keyboard and mouse tray assembly of FIG. 1;
FIG. 3 is a back side elevational view of the computer keyboard and mouse tray assembly of FIG. 1;
FIG. 4 is a left side elevational view of the computer keyboard and mouse tray assembly of FIG. 3;
FIG. 5 a right side elevational view of the computer keyboard and mouse tray assembly of FIG. 3;
FIG. 6 is a front side elevational view of the computer keyboard and mouse tray assembly of FIG. 3;
FIG. 7 is a top plan view of the computer keyboard and mouse tray assembly of FIG. 3;
FIG. 8 is a bottom plan view of the computer keyboard and mouse tray assembly of FIG. 3; and,
FIG. 9 is a perspective view of the computer keyboard and mouse tray assembly of FIG. 1, showing the computer tray removed from the left and right mouse trays and suspended from the left mouse tray.
The broken lines showing the computer keyboard and mouse tray assembly of FIGS. 1 and 9 are included for purposes of illustrating the invention in use as supported by respective arms of a chair, and form no part of the claimed design.