(a) If a portable electronic device draws 1A current at a voltage of 2.5V, what is the power requirement for the device? (b) You have designed a fuel cell that delivers 1A at 0.5V. How many of your fuel cells are required to supply the above portable electronic device with its necessary (c) You would like the portable electronic device to have an operating lifetime of 100h. Assuming 100% fuel utilization, what is the minimum amount of H2 fuel (in grams) required? (d) If the fuel cell used methanol (CH3OH) fuel instead of H2, what would be the minimum amount (in grams) of methanol required for 100h of life again assuming 100% fuel utilization? Methanol has a molecular mass of 32g/mol. What would be the corresponding volume of liquid methanol fuel (the density of liquid methanol is 0.79g/cm3 )