Write python code these

1. Write a python program to calculate the square root of a user input using the sqrt method from the math module

friends = ('sam','sam','johnny','andy','john','sam','mary') 

2. Write a python program which does the following:

a) for the above string calculate the number of times "sam" appears in the tuple

b) change sam with smith

c) print index of johnny

3. dict = {'v1':100,'v2':54,'v3':247, 'v4':100,'v5':54,'v6':247} 

for the given dictionary, write a program that does the following

a) print all keys b) print all values c) calculate length