$${0.99 \leq \left| H\left( e^{j\omega} \right) \right| \leq 1.01,\ \ 0 \leq |\omega| \leq 0.3\pi }{\left| H\left( e^{j\omega} \right) \right| \leq 0.01,\ \ 0.35\pi \leq \mid \omega \mid \leq \pi}$$
Design a linear phase FIR filter using a suitable window to meet the following specifications: $${0.99 \leq \left| H\left( e^{j\omega} \right) \right| \leq 1.01,\ \ 0 \leq |\omega| \leq 0.3\pi }{\left| H\left( e^{j\omega} \right) \right| \leq 0.01,\ \ 0.35\pi \leq |\omega| \leq \pi}$$