Heat engine x takes in four times more energy by heat from

Question

Solve the all parts of given question:

Question: Heat engine X takes in four times more energy by heat from the hot reservoir than heat engine Y. Engine X delivers two times more work, and it rejects seven times more energy by heat to the cold reservoir than heat engine Y.

Part A: Find the efficiency of heat engine X?

Part B: Find the efficiency of heat engine Y.

Please help for the above question, totally confused!! Show each steps if possible, Thank you.