Answer:
0.0312J
Explanation:
Let x be the distance the staple moves:

And spring constant is 

Hence, the potential energy is 0.0312J
The 3rd Quadrant is the lower left one on a graph,
where ' x ' and ' y ' are both negative.
Your picture is completely unrelated to this question.
Answer:
Total charge provided by the battery could be 900000 C.
Maximum current provided by the battery for 37 minutes could be 405.405 A
Explanation:
Rating= 250 A-h
a. Total charge:

Suppose t=1h

We konw that
, replacing:

Total charge provided by the battery could be 900000 C.
b. Maximum current for 37 minutes

Maximum current provided by the battery for 37 minutes could be 405.405 A