Public class card { private student student; private string cardrecipient; private string cardmessage; public string tostring() { string returnstring; returnstring = "from: " + this. student + " \t recipient: " + this. cardrecipient + " \t message: " + this. cardmessage; return returnstring; } }

why is "student" colored in red in my code?

the answer to your question would be something called hertz. the unit of measurement called a hertz, which is one cycle per second, is used to measure clock speed. within one cycle, your computer processes, refreshes, or updates itself to the changes that it is going through. in the case of computer clock speed, one hertz equals one tick per second. the clock speed of computers is usually measured in megahertz (mhz) or gigahertz (ghz)