Final answer:
The student needs assistance with finding the partial derivative of a demand function with respect to the price of the product, evaluated at specific values for the price and the price of a substitute.
Step-by-step explanation:
The student is asking for help with calculating the partial derivative of the monthly demand function for a certain product with respect to the product's price. The given function for the demand is q = 17(σp+4pi)²/³, where pi represents the average price of a substitute for the product, p is the price of the product itself, and q is the monthly demand. The partial derivative of q with respect to p, denoted as ∂q/∂p, needs to be calculated at p = 7 and pi = 12. To solve this problem, we would use the rules of differentiation to find the derivative of q with respect to p, and then substitute the given values of p and pi.