The tables show Finn's history test scores and science test scores.

History Test Scores

78 65 72 85
68 70 80 82
Science Test Scores

78 45 80 88
80 78 62 x
A) Calculate the mean and the mean absolute deviation of Finn's history test scores. Give each answer correct to 2 decimal places.

B) The score x represents the score of the science test Finn has yet to take. If Finn wants to have the same mean score in science as in history, what score must he achieve on his last science test?

C) Including the score of the last science test from part B), calculate the mean absolute deviation of the science test scores and compare it with the mean absolute deviation of the history test scores. What conclusion can be drawn about Finn's test scores?
please help