Hard situation puzzles

A woman starves to death despite being surrounded by food.

A woman misread something and never saw another person again.

A person called the police and told them to ask about John K. Upon arrival at John’s house, the police found him dead. Examining the corpse, the police discovered severe injuries. But the apartment was in perfect order, without any signs of a struggle or break-in.

A man goes to the auto repair shop and asks the mechanic when he is available. The mechanic says he is busy for the next 2 hours. The man thanks him but doesn't return. A few days later, he asks him again, the mechanic says he is busy for the next one hour. Again, the man doesn't return. Next day the man asks him again and the mechanic says "You are lucky, 5 minutes and I'm available" but the man leaves anyway.