3. Write statements to concatenate following dictionaries to create a new one Sample Dictionary: dic1={1:10, 2:20} dic2={3:30, 4:40} dic3={5:50,6:60} Expected Result : {1: 10, 2: 20, 3: 30, 4: 40, 5: 50, 6: 60}

4. Write statements to check if a given key already exists in a dictionary

5. Write statements to iterate over dictionaries using for loops

6. Write statements to generate and print a dictionary that contains a number (between 1 and n) in the form (x, x*2) Sample Dictionary ( n = 5) : Expected Output : {1: 1, 2: 4, 3: 9, 4: 16, 5: 25}

python