4 and 5 please and thank you. the language is C++

4. Write a program that prints the number 1639.74592 with four decimal places, with three decimal places, with two decimal places, and with one decimal place. The width of each output should be set to be 10. 5. Extra Credit (10 points): Write a program that prints the tens digit of integer constant. For example, if constant is 1456, your program should print 5. If constant is 245, your program should print 4. If constant is 5, the output should be 0. Your program should include the original number followed by the digit in the hundreds position