You will have to create two tasks for "Task1", a Task1_daily and Task1_weekly. You will schedule those in the "Configure Trigger" under the trigger menu as a "On a Schedule" trigger. You will then need to create two tasks for Task 2 (Task2_daily and Task2_weekly) and set them to trigger "On event from another task". Hopefully you can figure out the Task3 and Task4 from here. You have to set up unique tasks in the chain to make it work like the old jobs. Your Schedule chains should look like this:
Daily schedule Job1 run task1_daily -->trigger task2_daily -- >trigger task 3
Weekly schedule Job2 run task1_weekly -->trigger task2_weekly -- >trigger task 4
I wish the old job method was still available, but this does work.