Charge

$$

$1$

$=$

$+$

$4\mathrm{.}00$

$$

nC

is at

$$

$=$

$0$

$,$

$$

$=$

$0\mathrm{.}200$

$$

m

and charge

$$

$2$

$=$

$-$

$5\mathrm{.}00$

$$

nC

is at

$$

$=$

$0$

$,$

$$

$=$

$0$

$.$ Find the

$$

$-$

and

$$

$-$components

of the total electric field caused by

$$

$1$

and

$$

$2$

at $($a$)$

$$

$=$

$0$

$,$

$$

$=$

$0\mathrm{.}100$

$$

m

; $($b$)$

$$

$=$

$0$

$,$

$$

$=$

$0\mathrm{.}400$

$$

m

; $($c$)$

$$

$=$

$0\mathrm{.}200$

$$

m

$,$

$$

$=$

$0$

$.$