Python 3 Assume a Dictionary structure exists that associates letter grades (“A”, “B”, “C”, etc.) to their respective numeric range (expressed as a string, for example: “90,100”, “80,89”, “70,79”,...

Python 3

Assume aDictionary structure exists that associates letter grades (“A”, “B”, “C”, etc.) to their respective numeric range (expressed as a string, for example: “90,100”, “80,89”, “70,79”, etc.). The name of the structure isgradeConvert. Write a single Python statement to retrieve the point range for a letter grade of "B". Store the retrieved value in a variable named "ptRange".