def build_launch_plan(product_name, launch_date):
from datetime import timedelta
tasks = [
{'task': 'Finalize product', 'deadline': launch_date - timedelta(days=14)},
{'task': 'Create listings', 'deadline': launch_date - timedelta(days=7)},
{'task': 'Prepare marketing', 'deadline': launch_date - timedelta(days=3)},
{'task': 'Launch day', 'deadline': launch_date},
]
return tasks