How Does Mass Loss Influence Orbital Expansion?

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Homework Statement
How much do you expect the Earth-Sun system to expand over the 10 Gyr
main-sequence lifetime of the Sun, given that the Sun is losing mass in the form of
light? And how much
given the mass-loss rate of 3×10−14 M⊙ yr−1 associated with the solar wind?
Relevant Equations
See below
1.PNG
2.PNG


I need help with d) and e).
Currently how I've approached it is by using the fact that e=mc^2 and I can correlate this emission of light with loss of mass.

Then I can use the formulas in a) to correlate this with da/dt. I'm struggling to figure out what the rate of energy loss is though.
 
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accalternata said:
I'm struggling to figure out what the rate of energy loss is though.
Have you tried the reference given in the question?
 
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