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Qn1: You are asked to write a simple C program that will accept an integer value in the range of 5-95 and as a multiple of 5 representing the number of cents to give to a customer in their change. The program should calculate how many coins of each denomination and display this to the user. Valid coin values are 50, 20, 10 and 5. Your solution (program and algorithm) should be modular in nature. This requires the submission of a high-level algorithm and suitable decompositions of each step. Note that for this problem the principle of code reuse is particularly important and a significant number of marks are allocated to this. You should attempt to design your solution such that it consists of a relatively small number of functions that are as general in design as possible and you should have one function in particular that can be reused (called repeatedly) in order to solve the majority of the problem. If you find that you have developed a large number of functions which each performs…

Problem Statement       The barcode used by the U.S. Postal System to route mail is defined as follows:  Each decimal digit in the ZIP code is encoded using a sequence of three half-height and two full-height bars.  The barcode starts and ends with a full-height bar (the guard rail) and includes a checksum digit (after the five-digit ZIP code or ZIP + 4), computed by summing up the original digits modulo 10.   Define the following functions:   Draw a half-height or full-height bar on stddraw. Given a digit, draw its sequence of bars. Compute the checksum digit.   Also define global code that read in a five- (or nine-) digit ZIP code as the command-line argument and draws the corresponding postal barcode.