find the variance and standard deviation of the given set of data to the nearest tenth. {530, 150, 320, 500, 200, 690, 770}

a. variance = 48,326.5, standard deviation = 219.8

b. variance = 56,381, standard deviation = 237.4

c. variance = 219.8, standard deviation = 48,326.5

d. variance = 48,326.5, standard deviation = 24,163.3