Practice: Solve the following and show complete solution: 1 1. The pricedemand function for selling a: Math audiobooks is given by p(:r) = 532 is: pesos, while the prot in selling a: is determined by P(:1:) = 482:1: I2 150 pesos. Use marginals to approximate the cost in selling the 8th Math audiobook. 2. Find a local linear approximation of f(35') = aux/3 211' and use it to estimate 0.99v1.02