&lt;!-- KEY CONFLICT: stored=0810, computed=0752 --&gt;<br>
Convert km to m, then find the walking time.<br><br>
&bull; \( \frac{1}{2} \) km = 500 m<br>
&bull; Time needed = 500 ÷ 60 = \( 8\frac{1}{3} \) min = 8 min 20 s<br>
&bull; To arrive at 08 00, leave at 08 00 − 8 min 20 s = 07 51 (rounded to 07 52 in whole minutes)<br><br>
Final Answer: 0752