please anawer using Matlab

For this question, you are going to work on sampleERGdata .mat. You are expected to investigate the data and plot topographical mapping for the ERp's for specific time points. 3.1 (2 points) 1. How many EEG channels are present? 2. What are the names of channels, just give 5 examples. 3. What is the sampling rate? 4. What is the dimension of the EEG Data? 5. How many trials recorded? 3.2 (10 points) For this question you must specify the trials to ignore. Excluded trials can be selected from 20th trial to 40 th trial, then you will answer the questions below. a) Calculate the erp. (2 points) b) Plot the ERP. (Select the channel top lot based on your order in the list above. Do not forget labeling axis.) (2 points) c) Plot topographical mapping for 6 different time points with increment of 200ms, and explain what you are understanding from the plots. ( 6 points)