4. Taipei Company produces a special toy. The various unit costs are as follows: Suppose Taipei uses a 25% markup on the full unit cost. Compute the unit price of the toy. (10%)

1. (10%) Let f(x) be a differentiable function as shown in Figure 1. It needs to compute the integral $\int_{a}^{b} f(x)dx$. For some reason, the integration is not possible. We decide to linearize f(x) at x = a$ and use the trapezoidal area $A$ to approximate the integral, i.e. $ \int_{a}^{b} f(x) dx \approx A $. Please find the area A.

4. Taipei Company produces a special toy. The various unit costs are as follows:

Suppose Taipei uses a 25% markup on the full unit cost. Compute the unit price of the toy. (10%)

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