SOS help me with this asap and make sure its correct, thank you

An integer programming model for maximizing the net present value (in $ ) is developed. (Letting xi={1ifinvestmentalternativeiisselected0otherwisei=1,2,3,4,5,6. (a) Assume that Test market new product will only be funded if the Advertising campaign is also funded. What additional constraint should be added to the integer programming model? (b) Assume if new equipment is purchased, one of the warehouse expansion projects must be implemented. What additional constraint should be added to the integer programming model