Zoe is trying to perform a Heck coupling between an aryl bromide and an olefin using 1 mole percent of palladium acetate and 2 mole percent of triphenylphosphine along with a slight excess of base. By name or number, identify all of the following three changes which would dramatically improve Zoe's yield: 1) Using 2 mole percent palladium acetate 2) Using 3 mole percent triphenylphosphine 3) Changing the palladium source to Pd(dba)2