On the basis of dictionary learning write and give the output of the followings programs

1. Write a Python program to combine two dictionary adding values for common keys. d1 = {‘a’: 100, ‘b’: 200, ‘c’:300},d2 = {‘a’: 300, ‘b’: 200, ‘d’:400}
2. Write a Python program to find the highest 3 values of corresponding keys in a dictionary.

Note:- Write and develop code in your IDE.