When a double$-$edged full potential $($potential $1)$ with a positive $(+)$ Burgers vector exists in the X$-$Y coordinate system as shown in the following figure in the FCC structured metal $($the shear modulus of this metal is $80$ GPa, the atomic radius is $0\mathrm{.}127$ nm$,$ and the Poisson's ratio is $0\mathrm{.}3)|$What is the direction in which the blade potential $2$ glides at point A due to the stress field of potential $1?$