Ok i dont get how to do the first column but i can help you with the rest!
The second column (Robin) has 99, 108 102, 107, 119, 107, 5.2
The ratio of those numbers would be 647.2 (all the numbers added together) and then you have to divide them by 7( becuase thats how many numbers there are) and that would be rounded up to the nearest 10th as 92.46.
The 3rd column (Evelyn) has 125, 137, 138, 145, 145, 138, 5.6
The ratio of those numbers would be 833.6, and then divided by 7 that would be 119 ( rounded to nearest 10th).
Again i dont reallly get the whole MAD thing but i hopw thid helped a little!
