Answer:
The frequency shift detected is
Explanation:
From the question we are told that
The normal frequency of the state highway patrol radar guns 
The speed of approach is 
Now the frequency measure by the the state highway patrol radar guns as your car approaches is mathematically represented as

Where c is the speed of light which a has constant value of

Now

=>
substituting values

The answer to your thing is d
The reason being nuclear reactions are slow in less massive stars than in massive stars hence they age slowly.