The heating values of pure gasoline and pure ethanol are 32.0 and 21.1 MJ/l respectively. How much heat per liter would produce combustion of (a) pure gasoline, (b) a blend of 90% gasoline and 10%...

The heating values of pure gasoline and pure ethanol are 32.0 and 21.1 MJ/l respectively. How much heat per liter would produce combustion of

(a) pure gasoline,

(b) a blend of 90% gasoline and 10% ethanol, and

(c) blend of 15% gasoline and 85% ethanol?