5. a) Default Argument (Problem)

Write a function that take the first name and last name as arguments and prints them on the screen. The last name has a default value of “Smith”?

Write a summation function that finds the sum of numbers passed as arguments. This should take 4 arguments but should not fail if only 2 arguments are provided. In other words, if the third and fourth arguments are empty then the function should still work.

Write a python program that finds the greatest among three numbers taking one number as default argument? Have the default argument value as 0 (zero).

Write a python program that finds the LCM of two numbers taking one number as default argument?

Hint: LCM = lowest common multiple.
It is a number that greater than both the numbers and exactly divisible by both numbers. 

Hint2: Use a for-loop / while loop to keep incrementing a value until it is exactly divisible by two numbers. 

Hint3: Once you find the correct number you can use “break” statement to exit the for loop.

Write a python program that implements a function to find the area of a circle taking radius as arguments and the value of pi will be taken as default argument?

Area of circle = pi * r * r, where r = radius, default value of pi = 3.14.

Write a python program that takes the name of a person and his title (Mr. / Mrs.) as argument and then displays them on the screen. In case the title is not provided, the function must print “Mr./Mrs.” before the name?