Part A

Two negative and two positive point charges $($magnitude $Q=5\mathrm{.}18mC)$

are placed on opposite corners of a square as shown in the figure $(a=$

$0\mathrm{.}170m).($Figure $1)$

Determine the magnitude of the force on each charge.

Enter your answers numerically separated by commas.

$F_1,F_2,F_3,F_4=$

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Part B

Determine the direction of the force on each charge.

Enter your answers numerically separated by commas.

${}_1,{}_2,{}_3,{}_4=$

$.$ counterclockwise from the $+x$ axis

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Figure