$[5\mathrm{.}7]$ At least how many testing cases are needed to fully test the program below? Hint: Each branch should have at least one testing case.

if num $\frac{?}{3})10$ :

num $=$ num $**2$

elif $($num$/3)<mtext\; id="EditorElement\_2571897"></mtext><mn\; id="EditorElement\_2571898">1</mn><mn\; id="EditorElement\_2571899">5</mn>$:

num $=$ num $+1$

elif $)$

$(u\frac{m}{3}$ :

num $=$ num $\frac{?}{2}$

else:

print$($num$)$