Which term refers to the speed at which reactants are converted into products?

Can someone me with 3 and 4 plz. this is for masteries test.

What type of reaction fuels the processes seen here?

For the reaction c6h14(g) & longrightarrow; c6h6(g) + 4h2(g), δp(h2)/δt was found to be 2.5 x 10-2 atm/s, where δp(h2) is the change in pressure of hydrogen. determine δp(c6h14)/δt for this reaction at the same time.