c++ language

1. Write a C program to take a weighted average of two numbers x1 and x2 such that x1 has 70% weightage.

2. Develop a program that takes a three-digit number and display the sum of these numbers.

e.g Number is: 346, sum of all three numbers is: 13.

Hint: look for division and remainder operations

3. Enter a two-digit integer number from user. Check whether 10^th place digit of the entered number is even or add.

e.g Entered number is : 45 ; Number at 10^th place is even.

Hint: look for division and remainder operations