a) depends on the gear ratio of your car. usually between 2.0 - 3.0k rpms is ok. i usually shift gears by 2.5k.

b) depende sa tarik ng humps. may mga humps na constructed na you just glide over it in 3rd gear, pero yung mga humps sa village namin talagang full stop. so balik primera.
c) isa lang maalala ko...shifting lanes... kala ng mga tao tama, pero actually mali. you should just stay in your lane.....