Problems about Linear Time-Invariant Systems

Please answer the 11 questions in the attachment in detail.
Please don’t plagiarize. Do not use matlab.
Below is Question 1 and 2, and the rest are in the attached picture.
1. x[n]=u[n]-u[n-3], h[n]=u[n]-u[n-3]. y[n]= x[n]*h[n]. Find and sketch y[n].
2. y[n]=1.01y[n-1] x[n], y[-1]= 0. x[n]= 2