What is the answer to 5 2/3+1 1/2

Answer and workings in the attachment below.

A- miguel because the range of adam is 106-91 which is 15. miguel is 105-85 which is 20.b- ok this second question is very poorly written. i will come back to answer it in a c- adam had higher numbers and a smaller range than miguel, who had a bigger range but lower numbers.t