Can someone solve this for me

1. Suppose a dictionary contains the marks of each student where key is the 
student name and value is the mark. Your task is to print the name of the 
pair of students whose average mark is equal or greater than 90. For 
example, a dict contains the following elements

        My_dict = {‘A’:87,’B’:93,’C’:’90,’D’:84,’E’:89}
        Pair of students having 90 or more marks as average are - AB, BC, BE.
        BA, CB and EB should not be printed as the pairs are printed once.

𝐒𝐚𝐦𝐩𝐥𝐞 𝐈𝐧𝐩𝐮𝐭:
{‘A’:87,’B’:93,’C’:’90,’D’:84,’E’:89}
𝐒𝐚𝐦𝐩𝐥𝐞 𝐎𝐮𝐭𝐩𝐮𝐭:
AB
BC
BE