void page1() {
  String t = "Step 1 - The Scientific Hypothesis";
  textFont(myboldfont, 18);
  text(t, 30, 160);

  t = "Scientific Hypothesis: The average "+ aStudy.obj + " in the US is " + aStudy.relation + " " + nf(aStudy.muo, 1, 2) + " " + aStudy.unit+".";
  drawStrings(t, 30, 190+25, 25);

  t = "Choose the appropriate case and click Answer: ";
  text(t, 30, 240+25);

  fill(0, 0, 255);
  drawStrings(feedback, 80, 330, 25);

  leftarrow.setVisible(false);
  bg.setVisible(false);
  bl.setVisible(false);
  bd.setVisible(false);
  ans.setVisible(true);
  cb1.setXY(425,236+15);
  cb1.setVisible(true);
  tf3.setVisible(false);
  cb6.setVisible(false);
  cb7.setVisible(false);
  cb4.setVisible(false);
}