4-Write the definition of function with two parameters (start and end) of type int. The function prints a called PrintNaturallNumbers all the numbers from start to end. .I. 5- Write a program that prompts the user to enter two numbers (nl and n2) then function: swap them. Your program must have the following a. Swap: This function takes the reference parameters of nl and n2 and swap their values. Sample run: Enter two numbers n1 and n2: 10 20 In Main function- values before swapping: 10 20 In Swap Function- values before swapping: 10 20 In Swap Function- values after swapping: 20 10

python3 program

Please fill in the blanks. /* This function asks for 2 strings from the user and asks the user to choose what they want to do with them.   Inputs: 2 strings, and a character for choice. Output: execute that choice.   Choices can be: 'E'/'e': call checkEqual() function                  'C'/'c': call concatStrings() function                   Everything else: invalid and exit  */   #include<__1__> //library to use printf and scanf #include<__2__> //library to use boolean #include<__3__> //library to use exit(0) #define len 1000 /*This function just concatenates 2 strings using a */ __4__ concatStrings(__5__ w1[], __6__ w2[], __7__ w3[]) {             int w3_idx = 0; //index for w3               //Copy word1 w1 over to the combined string             for(int i = 0; __8__ != __9__; i++) //loop runs as long as string is not done             {                         __10__[__11__] = __12__[__13__]; //copy a character from w1 to w3                         w3_idx++; //update…