Hello! I'm having trouble with his practice problem. Im not too sure why I'm getting it wrong.

Colonial State College is considering building a new multipurpose athletic complex on campus. The complex would provide a new gymnasium for intercollegiate basketball games, expanded office space, classrooms, and intramural facilities. The following activities would have to be undertaken before construction can begin. Activity A B C D E F G H Description Survey building site Develop initial design Obtain board approval Select architect Establish budget Finalize design X Obtain financing Hire contractor This answer has not been graded yet. Immediate Predecessor A, B D, E E F, G Time (weeks) 7 9 14 2 5 14 11 (a) Draw a project network. (Submit a file with a maximum size of 1 MB.) Choose File No file chosen 6 (b) Identify the critical path. (Enter your answers as a comma-separated list.) b, c, e, f, h (c) Develop the activity schedule for the project. Earliest Start Activity A B D E F (5 G H 0 9 0 23 27 23 27 42 X X 9 Latest Start X x 10000 7 10 Earliest Finish X 7 Latest Finish X DOULU JU Slack X 00000 (d) Does it appear reasonable that construction of the athletic complex could begin one year after the decision to begin the project with the site survey and initial design plans? What is the expected completion time for the project? The expected completion time is 54 x weeks, which is less than 1 year