i.3.3.29 Definite Integrals

Condition: Calculate the following definite integrals: a) \( \int_{0}^{1} \frac{x^{2} d x}{\sqrt{4-3 x}} d x \) b) \( \int_{\ln 3}^{\ln 2} \frac{d x}{\sqrt{1+e^{x}}} \).