If ${ z }_{ 1 },{ z }_{ 2 },{ z }_{ 3 },{ z }_{ 4 }$ be the vertices of a square in Argand plane , then

${ 2z }_{ 2 }=\left( 1-i \right) { z }_{ 1 }+\left( 1+i \right) { z }_{ 3 }$

${ 2z }_{ 4 }=\left( 2-i \right) { z }_{ 1 }+\left( 2+i \right) { z }_{ 3 }$

${ 2z }_{ 2 }=\left( 3-i \right) { z }_{ 1 }+\left( 3+i \right) { z }_{ 3 }$

${ 2z }_{ 4 }=\left( 4-i \right) { z }_{ 1 }+\left( 4+i \right) { z }_{ 3 }$