He! i need someone who is really good at java coding to help me out! NO FILES Given a string str and an int len, return the first len characters from str. If there are not len characters in str, return the entire string.

firstNCharacters( "Hello", 2 ) => "He"

firstNCharacters( "Hello", 3 ) => "Hel"

firstNCharacters( "Howdy", 1 ) => "H"

firstNCharacters( "Hi", 7 ) => "Hi"

firstNCharacters( "This One", 0 ) => ""

Which of the following is a way that advancements in technology improve humans' ability to measure air quality and protect human health? a. air quality data gathered by new instruments can be used to reduce exposure to pollutants. b. new technologies enable natural and human-made pollution sources to be located and monitored. c. air quality data gathered by new instruments can be used to predict trends in pollution over time. d. new technologies allow governments to make informed decisions about the regulation of pollution. (choose more than one)

How can the temperature of a room be raised by 5degreesf?

Hazel has just finished adding pictures to her holiday newsletter. she decides to crop an image. what is cropping an image?