Approximate Modified Duration Question

CFA Level I Fixed Income
#1 
  A 14% annual pay coupon bond has 6 years to maturity. The bond is currently trading at par. Using a 25 basis point change in yield, the approximate modified duration of bond is closet to.

A 0.392
B 3.888
C 3.970

The answer shown is B on Kaplan. But how do you find V- & V+ in the first place ?
The question didn’t give YTM% so I can’t seem to solve for V- or V+
Much appreciated.

#2

Yes, it does.

Think.

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#3

Okay so it seems that the question is incomplete. Thank you so much

#4

It’s not incomplete.

It tells you everything you need to answer the question.

#5

It’s at par, which means YTM = Coupon.

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