this is project management but please help!

You have signed a contract to build a garage for the Simpsons You will receive a $500 bonus for completing the project within 30 working days . The contract also contains a penalty clause in which you will lose $100 for each day the project takes longer than 30 working days Given the information below, complete the forward and backward puss, compute activityslack, and Identity the critical activities ID Predecessor None A B (days) 4 3 5 a A B C D t F G H 1 1 K Description Prepare site Pour foundation Erect frame Roof Windows Doors Electrical Rough in frane Door opener Paint Cleanup C C D, E, F, G F G H1 wi 3 4 2 1 G days ABCFHJK The project will take The critical activities are The early start on Activity Dis The late start on Activity ES The lack on Activity is The slack on Activity is Idays days days days