A [answer] cipher is typically implemented by performing a AND mathematical operation at least two bytes at a time. A. stream B. DES C. key D. block

4. Create a loop that asks if the user would like to encrypt some text, decrypt some cipher text, or exit the python program. Perform the operation the user selects, printing the computed text if applicable.

What does it mean to "pass backwards"?

Using the python code below. Identify the following: A. Loop B. Variable C. Conditional Statements D. Operators E. FUnctions   Python Code: file1 = open('database.txt', 'r')count = 0    name = []age = []dep = []address = []sr_code = []status = []condition = []while True:    count += 1    line = file1.readline()    # if line is empty    # end of file is reached    if not line:        break    else:      try:        data = line.split(",")        name.append(data[0])        age.append(data[1])        dep.append(data[2])        address.append(data[3])        sr_code.append(data[4])        status.append(data[5])        condition.append(data[6])      except:        none = ""file1.close() def dataUp():    with open("database.txt", "w") as f:       for i in range(0,len(name)):          f.write(name[i]+"," +age[i]+","+dep[i]+","+address[i]+","+sr_code[i]+","+status[i]+","+condition[i]+"\n")       f.close()                def add():    inp = input("Name: ")    name.append(inp)    inp =…