8. (10 pts] Convert decimal +49 and +29 to binary, using the signed-2's-complement representation and enough digits to accommodate the numbers. 9. [10 pts) perform the binary equivalent of (+29) + (-49), (-29) + (+49), and (-29) + (-49). Convert the answer back to decimal and verify that they are correct. 10. [10 pts] Represent the unsigned decimal numbers 609 and 516 in BCD, and then show the steps necessary to form their sum