Write a Program in Python for the following scenario
 Problem 1: We have 4 digit numbers on number plates, i want the sum in following way
4299 => 4+2+9+9 => 24 => 2+4 => 6
0414 => 9
 Donot use lists, str to represent a number.
def sum(registration_number):
"""
This method is used to return the sum of registration numbers
"""
total = 0
while registration_number > 0:
total = total + registration_number%10
registration_number = registration_number//10
if total <= 9:
return total
else:
return sum(total)

When we want to solve problems using programming languages, we need to think in terms of
 datatype
 operators
 sequence of steps
 conditional statements
 looping constructors

Problem 2: write a function in python which will calculate the EMI based on principal and interest rate Refer Here
def calculate_monthly_installment(
principal,
rate_of_intrest,
duration,
processing_fee_percent=0):
"""
This method should calculate monthly installment
params:
prinicpal: Amount of the product purchased
rate_of_intrest: rate of interest
duration: duration in months
processing_fee_percent: processing fee percent default is zero
Returns:
monthly installment
"""
pass
 Refer Here for the program and