PLEASE HELP !!! Seriously someone help me and solve this it’s worth 3 marks and I need exactly 3 marks to get a 7 . HELp

y is inversely proportional to x^3
y=28 when x=a
Work out the value of y when x=2a

PLEASE HELP Seriously someone help me and solve this its worth 3 marks and I need exactly 3 marks to get a 7 HELp y is inversely proportional to x3 y28 when xa class=