Can I please get some help with this Matlab practice? can I get the code so that I can see how it will be entered on Matlab

For Exercises 1-3, use the discrete system described by the difference equation. where x(n) is the system's input, y(n) is the system's output and a2 =0.7 1974 192 =0.43220307 a=-0.18902544 b0.43220307 a3 =-0.15739 157 bs = 0.25445939 h=0.25445939 1. Draw a Direct Form I block diagram of the system (see Chapter 10.8 for more details). Indicate the number of delays (memory registers) required to implement the block diagram