Question

It takes Harry 34 s to walk from x1 = -11 m to x2 = -54 m .

Answer 1

Missing question:
"What is his velocity? Please answer using two sig figs in m/s."

Solution
The relationship between velocity (v), space (S) and time (t) is
$v= \frac{S}{t}$
The space covered by Harry is
$S=x_1 - x_2 = -11 m-(-54 m)=43 m$
and so the velocity is 
$v= \frac{43 m}{34 s} =1.26 m/s$