The following code has at least 3 errors. Rewrite the code to fix the errors. Write code that will print the first and last characters of String y in alphabetical order on the same line. for example, if y is "unicorn", your code should print "m" Convert the binary number 10111 to both hexadecimal and decimal by hand. Covert the hexadecimal number IABEI to binary by hand. Convert the decimal number 99 to binary by land. Given that a = false and b = true, state the value of the following expressions