[Information management][Data processing] Multiple choices ( 1 is correct each) please shortly explain it if possible, definitely thumbs up!

QUESTION 1: Which of the following statements are true when we're referring to a scatter plot? It is useful when analyzing frequency information. It facilitates spotting relationships between variables. You can visualize more than 2 variables simultaneously. You can visualize a maximum of two variables simultaneously. Question 2: Which of the following are typical actions taken in the data cleaning process of EDA? Data consistency checking Dealing with outlayers Data filtering Data normalization Question 3: Which of the following statements are true when we're referring to a Histogram plot? It is used in univariate analysis It is mostly used to visualize time distributions It is mostly used to visualize frequency distributions It is used in multivariate analysis QUESTION 4 : Which of the following options can not help you to encrypt your message: MD5 Vigenre cipher Random substitution DES Question 5: In a user authentication system, if we want to prevent the inserted password from malicious decryption, a random salt will be added to the password. Which of the options would make most sense to apply to the salted password? AES Random substitution Frequency analysis SHA1