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initially room temperature will b noted for the mixture in reactor.
according to that set a set point to ramp the temp by 10 degree rise in 10 minutes.
if temperature exceeds 10 degrees close the valve completely.
the problem doesn't mentioned the type of liquid, diameter of pipe, amount of liquid... and other you have asked.
n about amount it will be total of all 8 tanks contains passed in specified amount.
for example for recipe A tank1 pass 10 liters, tank2 5 liters, tank3 25 liters....... tank8 15 liters etc.