Ashes to Ashes
Obtained from: Mike
Difficulty level: Very hard
Reward: 900 Exp, Molotov
Bring fuel from the gas station to burn the bodies
Mike stands right in front of the Lifeguard Tower, next to a pile of zombies #1. Your task is to get a gas to burn corpses, so the stench won't attract more zombies here. For this task a car is definitely useful #2, because after you take a canister you won't be able to use any weapon. An easy way to access a car is to complete the Lazarus Rising quest. There is also a car at the gas station - you'll get an access to it during this quest. And one more car can be found on your way to the station, near the entrance to the beach.
Once you reach the station #1 go over to the window and talk to Sathiss - he will open the door. Being inside, go talk to Don Mark. You'll learn that pumps do not work and a power generator is located in a storage room full of undead. Exit through the back door and find a ladder leading to the roof #2 and go to the top.
Jump down to the storage room through the open frame in the roof. There is a Thug #1 and few Walkers inside. After clearing the storage room of zombies, activate a generator #2 and then unlock the door taking off a plank.
Take one of empty canisters and put it next to the petrol pump. Watch out, because few waves of infected will attack you now #1. After eliminating the threat refill the canister #2.
Put the full canister to the car trunk #1 and return to the Lifeguard Tower (1). Once you get to the destination place, grab the canister and bring it to Mike putting it next to the pile of zombies. A cut-scene activates, where zombies are burned. Do not forget to collect your reward - Mike can be now found in the upper part of the Lifeguard Tower.
Obtained from: Hank
Difficulty level: Very easy
Reward: 300 Exp
Find 4 parts from nearby cars
A mechanic will ask you to bring him few car parts from nearby cars. This task is very easy - it is enough to go along a main road from the Lifeguard Tower and examine few cars along your way. Once you get close to a car and there is a part you're looking for, a hand icon will appear on a map #2.
Once you've located proper car move to its front #1 and then hold a key to pull out the car part. After collecting four of them and giving them to Hank, you'll be able to use a car after a while #2. When you use a car and drive it somewhere, it will appear at the garage again after some time.