Answer
$x_1=3.2m$
$x_2=4.6m$
$x_3=7.8m$
Work Step by Step
a) $f=1.6m$
$b=0.7m$
$d=2.3m$
The first reflection is facing you and is $x_1=2f=2\times1.6m=3.2m$
The second reflection is of your back
$x_2=b+f+d=0.7m+1.6m+2.3m=4.6m$
The third reflection is
$x_3=4f+2b=7.8m$
