CityOfAngels

Alright, I'm having trouble with the following missions. PLEASE help!

#1) Spoiler: I can't seem to beat the Zero mission where you have to gun down all those toy airplanes. No matter how many I destroy, more keep coming and they always eventually make Zero scream "CURSE YOUUUUUUUUU!"
#2) Spoiler: I'm stuck on the pimp's mission where you have to go to different places while that guy's cell-phone battery is running out. I made it all the way through up until the airport. I went through the tunnels and reached a closed gate. They say "They're right there!" and I'm supposed to catch 'em, but the gates are closed and I can't even crash through them! This one is REALLY frustrating.
#3) Spoiler: I'm in the very last (12th) driving school mission, and it is amazingly difficult. I can't stop, I can't crash, AND I have to complete it in 1 minute, 20 seconds. I always make it to the first blip and either end up crashing/spinning-out to a halt (most often), or just plain running out of time.

Any help is greatly appreciated! Thanks!

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The words "love" and "life" go together. It is almost as if they are one. You must love to live, and you must live to love, or you have never lived nor loved at all.