4. (12 points) Given the following dictionary, write the Python statement(s) to print gradeCounts = { "A": 8, "D": 3, "B": 15, "F": 2, "c": 6 } (a) all the keys. b) all the values. (c) all the key and value pairs. d) all of the key and value pairs in key order. (e) the average value (of all the values). (f) a chart similar to the following in which each row contains a key followed by a number of asterisks equal to the keys data value. The rows should be printed in key order, as shown below. A: C: D: F