What is the answer of this question?

0if x and y vary inversely and y=6 as x=7, what is the constant of variation?

Find the ratios of the corresponding sides

Will mark ! (10 points also! ) if x varies inversely with y and x =6 when equals y= 10, find y when x=8 a. y=4.8 b. y=7.5 c. y=40/3 d. y=4/15