For question one, you can see that
Robby moves east,

then he moves east again,
he picks up this can,

he moves east, he picks up this can
and then he moves south.

So, after he's done all that,
the two squares above him,

these will be empty,
this one will have a can,

and so all the directions around him
will be empty

except for his current site,
which will have a can.

So the correct answer is "C".

And his score,
well he's picked up two cans,

and he hasn't done anything to 
get negative points, so his score is 20.