parallel edge dislocations, $\backslash ($ A $\backslash )$ and $\backslash ($ B $\backslash )($tangent and Burger's vectors of the dislocations are equal in magnitude and direction$)$ lying on the same slip plane in this solid a distance apart, $\backslash ($ r$=100\backslash$mathrm$\{$~nm$\}\backslash ).$ The magnitude of the burger's vectors of the dislocations is $0\mathrm{.}2$ nm $.$

Determine the magnitude and direction of the force per unit length in units of N$/$m that dislocation A exerts on dislocation B$.$

Answer formatted as magnitude N$/$m : direction.

$1\mathrm{.}4$E$6$: $+$i

$1\mathrm{.}4$E$6$: $-$i

$2\mathrm{.}8$E$4$: $+$i

$2\mathrm{.}8$E$4$: $-$i