1. The problem involves three parts: a) graphing temperatures of seven Ethiopian cities on a number line, b) identifying the coldest city, and c) identifying the warmest city. 2. Since no specific temperature data was given, assume sample temperatures for demonstration: Addis Ababa 18, Adama 24, Hawassa 22, Debire Birhan 16, Gambela 27, Semera 30, Bahir Dar 25 (all in degrees Celsius). 3. To graph on a number line, plot each city’s temperature as a point corresponding to its value. 4. From the assumed temperatures, the coldest city is Debire Birhan at 16 degrees. 5. The warmest city is Semera at 30 degrees. 6. Next, we address the integer addition and subtraction problems: Activity 2.4.1 1. Calculate total profit or loss for each seller by summing their two transactions: - Hussen: $-15 + 17 = 2$ (Profit 2 Birr) - Almaz: $15 + (-15) = 0$ (No profit or loss) - Hailu: $-13 + (-20) = -33$ (Loss 33 Birr) - Derartu: $10 + 12 = 22$ (Profit 22 Birr) 2. Find sums using the number line method: a) $4 + (-8) = -4$ b) $-2 + 5 = 3$ c) $-3 + (-4) = -7$ d) $-4 + 0 = -4$ 3. Additional sums: a) $3 + 2 = 5$ b) $-20 + 0 = -20$ c) $-3 + 2 = -1$ d) $4 + (-3) = 1$ e) $-10 + 10 = 0$ This completes the requested problems, demonstrating integer addition and subtraction with detailed explanations.