(a) How much gravitational potential energ\\_.r (in J) (relative to the ground on which it is built) is stored in an Egyptian pyramid, given its mass is about 3 x 109 kg and its center of mass is 13.0 m above the surrounding ground? (Enter a number.) 4 *10'11 x Your answer cannot be understood or graded. More Information J (b) What is the ratio of this energyr to the daily food intake of a person (1.2 x 107 J)\":I (Enter your answer as a ratio to the number 1. Enter a number.) 3 " mm x Your answer cannot be understood or graded. More Information :1