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Shell gas station is having a sale on diesel. If you buy `6` gallons or less, you pay the regular price of `$4.09` per gallon. If you buy more than `6` gallons, you pay `$3.79` per gallon. Write a piecewise function for the price of `n` gallons of diesel at Shell.

` D(n)= {( ),( ),( ):}`   if `0<n ≤`
  if `n>`



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   x  x    n  |   | (   ) π DNE
   x    (   ) π DNE
( ) ( ] [ ) [ ] —∞ DNE
< > or All Real Numbers DNE
log logn ln n  | | e 
sin cos tan arcsin arccos arctan  
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