Using a 60-MHz spectrometer, a chemist observes the following absorption:...

Using a 60-MHz spectrometer, a chemist observes the following absorption:

doublet, J = 7 Hz, at d4.00

(a) What would the chemical shift be in the 300-MHz spectrum?

(b) What would the splitting value J be in the 300-MHz spectrum?

(c) How many hertz from the TMS peak is this absorption in the 60-MHz spectrum? In the 300-MHz spectrum?