Which of these titles will work in Java syntax? hello world

Helloworld

helloworld

HelloWorld

According to the video what are some tasks petroleum engineers perform check all that apply

Ramp charts are generally created in wordlotusexcelpowerpoint

Afile named data.txt contains an unknown number of lines, each consisting of a single integer. write some code that creates two files, dataplus.txt and dataminus.txt, and copies all the lines of data1.txt that have positive integers to dataplus.txt, and all the lines of data1.txt that have negative integers to dataminus.txt. zeros are not copied anywhere.