every person needs to do their hishtadlus in life (which in these questions are all the choices besides Hashem) but the real answer for each question in “do you believe?” is HASHEM
i.e. from your physical yetzer hara department you are convinced that all the work & effort in everything you do in life is what brings you the success but we all know the truth that all hatzlacha comes directly from Hashem just through different messengers to get it to you & in different ways (ex. 1 person makes his money through a rich smart investment which involves little time cause he knows how to spend his time wisely & is not in need to be kept busy to keep him away from sin. 2nd person gets his parnassa from kollel support from in-laws because he is spending his time with Hashem learning & his in-laws are making EXTRA income from Hashem to be able to also support their new son-in-law. 3rd example is a simple person working in a store thats makes just enough to make ends meet & works full time very busy, cause he is needed to keep busy away from sin C”V & is not holding by being responsible to run his own business cause then it will cause him to feel great & forget that his parnassah comes all straight from Hashem)