business chart.graph.squares diagram.prncil draw drawing line math pen result results school success UP work chart compass construction curve diagram. circle graph squares success results development diagram economy pencil blue color colouts crowd election figure figures pawns people poll polling red shape shapes vote voting airplane report statistics 3D abstract better green higher meeting more person reflection Rendered table white drafting finance finances financial accuracy antigen check checking colloidal coronavirus covid-virus detection diagnosis diagnostic-aid dropper drops home-use immunochromatographic-technology kit limitations limited lysis-buffer measuring-instrument medical nasal-secretion negative-result plastic quality-control-C-line rapid rectangular sample sampling-tube self-testing test test-cassette testing answers evaluation form option paper questions survey