For the maginifaction one
I got 0.42
For the hear rate i got 85.7
For the Cardiac output I got 8741.4 (stroke volume is 152-50).
For the water potential one, I put 0.28.
I got 4 to 16 for the volume bit.
For the enzyme one I talked about non competitive inhibition (they usually except both, but the shapes of both molecules were really different).