111. Solving a chemistry problem

The reaction 2FeS(c) 3O2(g)=2FeO(c) 2SO2(g) is given.
Write the kinetic equation for the reaction and determine its theoretical order. Determine how the reaction rate will change (how many times it will increase or decrease): a) with an increase in volume by 4 times; b) when the temperature decreases by 30 degrees, assuming the value of the temperature coefficient of the reaction rate to be 2.