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If two point charges qi and q2 at some distance r attract each other with a...

If two point charges qi and q2 at some distance r attract each other with a force of 60N, what force would they exert on each other if r is increased fivefold (x5), qi is tripled (x3); and q2 is quartered (x1/4) and the signs of both charges are reversed. The two charges will

a. attract eachother with a force of 9N

b. repel eachother with a force of 9N

c. attract eachother with a force of 1.8N

d. repel eachpther with a force of 1.8N

e. attract eachother with a force of 2000N

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