rvec$=$Triton.pos$-$Neptune.pos

$($b$)$ Several groups have written a different lines of code to calculate the magnitude of the separation vector; some are correct and some are incorrect. From your understanding of the line$($s$)$ of code below, which of them correctly represent the magnitude of the separation vector between Neptune and Triton?

Select all that are True

rmag$=$mag $(Triton.$pos$)-$mag $(Neptune.$pos$)$

rmag$=$mag $(Triton.$ pos$-$Neptune.pos$)$

rmag$-$mag $(Neptune.$pos$)-$mag $(Triton.$pos$)$

$($c$)$ Several groups have written different lines of code to calculate the unit vector that points from Neptune to Triton; some are correct and some are incorrect. From your understanding of the line$($s$)$ of code below, which of them correctly represent this unit vector?

Select all that are True.

rhat$=($Neptune$.$pos$-$Triton.pos$)/$mag $($Triton$.$pos$-$Neptune.pos$)$

rhat $=($Neptune$.$pos$-$Triton.pos$)/$mag $($Neptune$.$pos$-$Triton.pos$)$

rhat$=($Triton$.$pos$-$Neptune.pos$)/$mag $($Neptune$.$pos$-$Triton.pos$)$

rhat$=($Triton$.$pos$-$Neptune.pos$)/$mag $($Triton$.$pos$-$Neptune.pos$)$

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