\begin{exercice}On considère le quadrillage ci-dessous.
\begin{center}
	\psset{xunit=0.7cm,yunit=0.7cm}
\begin{pspicture*}(-1.2,-1.2)(6.38,6.12)
\psgrid[subgriddiv=0,gridlabels=0,gridcolor=CyanTikz40](0,0)(-1.2,-1.2)(6.38,6.12)
\psset{algebraic=true,dotstyle=o,dotsize=3pt 0,linewidth=0.8pt,arrowsize=3pt 2,arrowinset=0.25}
\rput[tl](2.2,5.22){$\vv{u}$}
\rput[tl](5.42,2.24){$\vv{v}$}
\psdots[dotsize=2pt 0,dotstyle=x,dotscale=2](0,0)
\rput[bl](-0.38,-0.46){$A$}
\psdots[dotsize=2pt 0,dotstyle=x,dotscale=2](2,0)
\rput[bl](2.08,0.08){$B$}
\psdots[dotsize=2pt 0,dotstyle=x,dotscale=2](0,3)
\rput[bl](-0.28,3.16){$C$}
\psdots[dotsize=2pt 0,dotstyle=x,dotscale=2](1,2)
\rput[bl](1.08,2.08){$D$}
\psdots[dotsize=2pt 0,dotstyle=x,dotscale=2](3,3)
\rput[bl](3.08,3.08){$E$}
\psdots[dotsize=2pt 0,dotstyle=x,dotscale=2](4,2)
\rput[bl](4.08,2.08){$F$}
\psline[linecolor=A1,linewidth=1.2pt]{->}(0,0)(2,0)
\psline[linecolor=B1,linewidth=1.2pt]{->}(0,0)(0,3)
\psline[linecolor=D1,linewidth=1.2pt]{->}(0,0)(1,2)
\psline[linecolor=F1,linewidth=1.2pt]{->}(1,5)(3,4)
\psline[linecolor=H1,linewidth=1.2pt]{->}(5,1)(5,3)
\end{pspicture*}
\end{center}
\begin{enumerate}
	\item Donner par lecture graphique les coordonnées des vecteurs $\vv{u}$ et $\vv{w}$ et des points $A$, $E$ et $F$ dans le repère $\left(A\ ;\ \vv{AB}, \vv{AC}\right)$.	
	\item Même question dans le repère $\left(A\ ;\ \vv{AB}, \vv{AD}\right)$.	
\end{enumerate}
\end{exercice}
