Answer:
a. develop a rough model, rapidly, and for the right price
Step-by-step explanation:
As we are doing a prototype and not a final product a rough model woul fullfil the demand.
As quickly (rapidly) we can do it, more time has the other person to decide upon continue or not
The right price will be to charge for the materials and labor spend not charging a profit margin like it was a final product as the customer will avoid to request in the future if our rate is much higher than others from the start.