What is the magnitude of your total displacement if you have traveled due west with a speed of 23 m/s for 175 s , then due south at 12 m/s for 255 s

Elements in group viiia (also known as group 18, or the noble gases) have similar properties because they all have a. the same number of electron shells b. full octets c. the same number of valence electrons d. the same number of electrons needed to fill their octet