please solve the question

Exercise 2: let study the system composed of 3 sub-systems given in the figure below. All the sub- systems are linear and time invariant as described below: a. x1(n) = x(n) - 0.2 x(n-1) b. x2(n) = x(n) + 0.5 x(n-1) - 0.15 x(n-2) C. y(n) = u(n) +0.3 u(n-1) 2. Write the impulse response of each filter (each sub-system). 3. Compute the equivalent filter h_eq. 4. Write the differential equation of the equivalent system. 5. Sketch the impulse response of the equivalent filter. x(n) x1(n) wan) y(n) h1 (n) h3 (n) x2(n) h2 (n)