The turtle commands we've seen so far move the turtle relative to the turtle's location and direction. If you want to get the turtle to a specific position on the screen using only moveForward() or turnLeft(), you need to know the turtle's location beforehand. Two new commands in the toolbox help resolve this issue. moveTo() moves the turtle to a location on the screen based on its X and Y coordinates. turnTo() turns the turtle in a specific direction. Together these commands can make many drawings easier to complete. Do This: Read the documentation: Read the documentation for moveTo() and turnTo(). Pay specific attention to how the coordinate system is arranged in App Lab as it is different from what you might have seen in a math class. Draw the smiley: Use these new commands to help you draw the smiley face pictured below. HINT: You can't really do this one without using penUp() and penDown().

This question involves a class named textfile that represents a text file. public class textfile { private string filename; private string filename; private arraylist words; // constructors not shown // postcondition: returns the number of bytes in this file public int filesize() { } // precondition: 0 < = index < words. size() // postcondition: removes numwords words from the words arraylist beginning at // index. public void deletewords(int index, int numwords) { } // precondition: 0 < = index < = words. size() // postcondition: adds elements from newwords array to words arraylist beginning // at index. pub lic voidaddwords(int index, string[] newwords) { } // other methods not shown } complete the filesize() method. the filesize() is computed in bytes. in a text file, each character in each word counts as one byte. in addition, there is a space in between each word in the words arraylist, and each of those spaces also counts as one byte. for example, suppose the words arraylist stores the following words: { mary had a little lamb; its fleece was white as snow. } the filesize() method would compute 4 + 3 + 1 + 6 + 5 + 4 + 6 + 3 + 5 + 2 + 5 as the sum of the lengths of each string in the arraylist. the value returned would be this sum plus 10, because there would also be 10 spaces in between the 11 words. complete the filesize() method below: // postcondition: returns the number of bytes in this file public int filesize() { }