Consider the following vector:

v $<-1$:$10$

Which of the following program is the correct way to calculate the running mean? Here$$s the expected result:

$[1]1\mathrm{.}01\mathrm{.}52\mathrm{.}02\mathrm{.}53\mathrm{.}03\mathrm{.}54\mathrm{.}04\mathrm{.}55\mathrm{.}05\mathrm{.}5$

Group of answer choices

for $($i in $1$:length$($v$))$ r$3<-$ mean$($v$[1$:i$])$

for $($i in $1$:length$($v$))$ r$4<-$ mean$($v$[$i$])$

r$1<-$ c$()$

for $($i in $1$:length$($v$))$ r$1<-$ c$($r$1,$ mean$($v$[1$:i$]))$

for $($i in $1$:length$($v$))$ r$2<-$ c$($r$2,$ mean$($v$[1$:i$]))$