Yes, I am happy to help you, but if you know that just asking this, people earn points practically free.
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GREETINGS!</h2><h2>
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Answer:</h3>
ITS
AND 
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GENERAL FORMULA OF ALKANE</u></h3><h3>

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Where n is the number of CARBONS
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A)
By using the General Formula of Alkanes having 4 carbon atoms is

C)
By using the General Formula of Alkanes having 5 carbon atoms is


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IF YOU USE THE SAME FORMULA FOR THE OTHER TWO OPTIONS THE OUTCOME WILL NOT BE AS SAME AS GIVEN IN THE QUESTION SO THOSE TWO ARE CAN NOT BE OUR ANSWER
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HOPE THIS HELPS!</h2>
The apparent effects of the gravity of unseen matter on visible objects
Answer:
a. 0.60
b. 1.30
c. 4.00
d. 6.70
e. 10.20
Explanation:
The 3 attached files shows a comprehensive solution
to the problems with answers highlighted as above