8. True or false, and explain briefly— (a) If you add 7 to each entry on a list, that adds 7 to the average. (b) Ifyouadd7toeachentryonalist, thatadds7totheSD. (c) ,thatdoublestheaverage. (d) If you double each entry on a list, that doubles the SD. (e) If you change the sign of each entry on a list, that changes the sign of the average. (f) If you change the sign of each entry on a list, that changes the sign of the SD.