title: How to calculate Average Waiting Time and average Turn-around time in SJF Scheduling?
body: <p>In SJF (Shortest Job First) Scheduling method. </p>
  
  <p><img src="https://i.stack.imgur.com/7u1Cy.png" alt="enter image description here"></p>
  
  <p>How to calculate Average Waiting Time and average Turn-around time?</p>
  
  <p>Is Gannt Chart correct ?</p>
  
  <p><img src="https://i.stack.imgur.com/fYKMx.png" alt="enter image description here"> </p>