1. Problem 3.4: Draw two straight lines on a grid of small squares to form two squares of different sizes and 4 rectangles. Step 1: Understand the problem. We need to draw two lines that intersect the grid to create two squares of different sizes and four rectangles. Step 2: Since the grid is made of small squares, drawing one vertical and one horizontal line inside the grid can create smaller squares and rectangles. Step 3: For example, draw one vertical line cutting through some columns and one horizontal line cutting through some rows. Step 4: This will divide the grid into 6 parts: 2 squares (one larger, one smaller) and 4 rectangles. Step 5: The exact drawing depends on the grid size, but the principle is to place lines so that the intersection forms the required shapes. 2. Problem 3.5: Calculate the percentage of students who play football. Step 1: Given the table: | | Boys | Girls | Total | |-----------|------|-------|-------| | Cricket | 41 | ? | 69 | | Football | 27 | ? | 95 | | Total | ? | ? | ? | Step 2: Find the number of girls playing cricket: $$\text{Girls Cricket} = 69 - 41 = 28$$ Step 3: Find the number of girls playing football: $$\text{Girls Football} = 95 - 27 = 68$$ Step 4: Calculate total students: $$\text{Total Students} = 69 + 95 = 164$$ Step 5: Calculate percentage of students playing football: $$\text{Percentage} = \frac{95}{164} \times 100 \approx 57.93\%$$ Answer: Approximately 57.93% of the students play football.