For the multistep reaction A+BC+D the ratelimiting step is unimolecular, with A as the sole reactant. If [A] and [B] are both 0.190 M, then the rate of reaction is 0.0030 M/s. What is the rate of the reaction if [A] is doubled?

Starting with the original concentrations, what is the rate of the reaction if [B] is halved?

Starting with the original concentrations, what is the rate of the reaction if [A] and [B] are both increased by a factor of 6?