Whats the mean, median, mode, range, of 6.5,7.5,7,8,8,8,9,10.5,10?

20 points, i will rate you 5 stars, and give if you answer this question! (20 points) here it is: given the proportion (x+y)/3=(y+z)/4=(z+x)/5, determine the value of (xy+yz+zx)/x^2+y^2+z^2. asap