Question $4$ Along with v $=+0\mathrm{.}6$ c$,$ which of the four coordinates do you know for the instant that the front of Pam's car reaches Ned? What are the values of those coordinates?

$-$select$-$x$$t $=($m or ns$)$ and $-$select$-$t$\text{'}$x$\text{'}$t $=($m or ns$)$

Question $5$ What are the coordinates $\{$x$,$ t$\}$ for each explosion as measured by Ned?

front @ $\{$ x $=$ m$,$ t $=$ ns $\}$

back @ $\{$ x $=$ m$,$ t $=$ ns $\}$

Question $6$ According to Ned, did they explode at the same time? $-$select$-$no$,$ front firecracker first$$yes$,$ at the same time$$no$,$ back firecracker first How do the numbers show this?

Question $7$ What are the coordinates $\{$x$\text{'},$ t$\text{'}\}$ for each explosion as measured by Pam?

front @ $\{$ x$\text{'}=$ m$,$ t$\text{'}=$ ns $\}$

back @ $\{$ x$\text{'}=$ m$,$ t$\text{'}=$ ns $\}$

Question $8$ According to Pam, did they explode at the same time? $-$select$-$no$,$ front firecracker first$$yes$,$ at the same time$$no$,$ back firecracker first How do the numbers show this?