The project represented by this network diagram has activity lengths in days and crash costs as shown in the table.What is the cheapest crash cost for the project if the contractor must complete all work in 45 days? 
Definitions:
Headache Monitoring
The systematic tracking of headache occurrence, intensity, and duration to aid in diagnosis and treatment planning.
Relaxation Therapies
Techniques or practices designed to reduce stress and anxiety, thereby promoting physical and mental well-being; examples include meditation, deep-breathing exercises, and progressive muscle relaxation.
Meta-analysis
A rigorous and systematic method of synthesizing research findings from various studies on a particular topic to achieve a comprehensive understanding.
Cognitive-behavioral Therapy
A short-term, goal-oriented psychotherapy treatment that takes a hands-on, practical approach to problem-solving by changing patterns of thinking or behavior.
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