in java

True or false? All elements of an array must be of the same type. Strings are immutable. Arrays cannot contain string references as elements. Arrays cannot contain null references as elements. Arrays can use strings as indexes. Parallel arrays must have equal length. Two-dimensional arrays always have the same numbers of rows and columns. Elements of different columns in a two-dimensional arrays can have different types. Write one line of code for each question. You may use the String class. How do you get the first character of a String s? The last character? How do you remove the first character? The last character