CWrite a program to Convert a Decimal number to a Binary numberC – program to create Simple Calculator using Switch CaseC – program to Input Marks of five subjects Physics, Chemistry, Biology, Mathematics and Computer. Calculate the Percentage and Grade as per the grade system tableC – Write a program to print TOTAL Number of Days in a Month using switch case.C – program to input any Character and check whether it is a ALPHABET, DIGIT or a SPECIAL CharacterC – Find the Student Grace Marks using the switch. Inputs are Marks ‘Class Obtained’ & ‘No of the Subjects – failed in’C – Check whether the Triangle is VALID based on the input lengths of its three SIDES entered through the keyboard. A triangle is considered valid if the sum of any two sides is greater than the largest of the three sides.C – While purchasing certain items, a discount of 10% is offered if the quantity purchased is more than 1000. If quantity and price per item are input through the keyboard, write a program to calculate the total expenses.C-If a Five-digit Number is input through the keyboard, write a program to REVERSE the number.C – Program to print a FULL-PYRAMIDC – Program to print the LEFT Half of the PYRAMIDC – Program to print the RIGHT Half of the PYRAMIDC Program to Calculate the Sum of All Elements in an Array. The program will prompt the user to input the array size and the individual array elements.C Program to Find the Minimum and Maximum Numbers in an Array. The program will prompt the user to input the array size and the array elements