Draw the following isomers of the alkanes of molecular formula C-H16 a. One with ONE tertiary and ONE quaternary carbon.
b. Two with TWO tertiary carbons.
c. One with ONE tertiary and THREE secondary carbons

I don't know how to draw it but I can solve it

answer is: nuclear fusion produces elements that are heavier than helium.

nuclei combine to form a heavier nucleus, releasing energy.  

for example, fusion of hydrogen atoms at the sun.  

this fusion nuclear reaction is in the inner core of the sun and hydrogen (atomic number 1) is conveted into helium (atomic number 2).  

the inner core is the central region of the sun and all solar energy is produced in the core by nuclear fusion.