Convert the decimal number 18 into its binary equivalent. What is the decimal equivalent of the binary number 1010? List three formatting features available in a word processor like Microsoft Word. Define the term Phishing. State two measures you can take to ensure online safety.

Item 3 a) To convert the decimal number 18 into its binary equivalent: Step 1: Divide 18 by 2. 18 ÷ 2 = 9 remainder 0 Step 2: Divide 9 by 2. 9 ÷ 2 = 4 remainder 1 Step 3: Divide 4 by 2. 4 ÷ 2 = 2 remainder 0 Step 4: Divide 2 by 2. 2 ÷ 2 = 1 remainder 0 Step 5: Divide 1 by 2. 1 ÷ 2 = 0 remainder 1 Reading the remainders from bottom to top gives the binary equivalent. Binary: 10010_2 b) To convert the binary number 10101_2 into its decimal equivalent: Step 1: Write out the binary number and assign powers of 2 to each digit, starting from 2^0 for the rightmost digit. 1 × 2^4 + 0 × 2^3 + 1 × 2^2 + 0 × 2^1 + 1 × 2^0 Step 2: Calculate the value of each term. 1 × 16 + 0 × 8 + 1 × 4 + 0 × 2 + 1 × 1 Step 3: Sum the results. 16 + 0 + 4 + 0 + 1 = 21 Decimal: 21_10 Item 4 Three formatting features available in a word processor like Microsoft Word are: i) Changing font style, size, or color.* ii) Applying bold, italic, or underline effects to text.* iii) Adjusting text alignment (e.g., left, center, right, justify).* Item 5 a) Phishing is a type of cyberattack where malicious actors attempt to deceive individuals into revealing sensitive information, such as usernames, passwords, or credit card details, by impersonating a trustworthy entity in electronic communications like emails or messages. b) Two measures you can take to ensure online safety are: i) Using strong, unique passwords* for different online accounts and enabling two-factor authentication (2FA) whenever possible. ii) Being cautious of suspicious links or attachments* in emails and messages, and verifying the sender's identity before clicking or downloading anything. That's 2 down. 3 left today — send the next one.