Integer Programming Problem and Project Management Problem

Attached are two questions for my Operations Management class. 

I will need the excel file with... 

Problem 1 is asking for: 

• Definition of Decision Varaibles
• Development of Objective Function
• Development of constaints 

Problem 2 is asking for: 

• Project schedule network
• Definition of decision variables 
• develop the complpete optimization model to minimiz the total cost (fixed cost + variable cost) of finishing the project in 31 days. 
• development of objective function 
• development of constraints
• Solve this model using solver