1. The user has provided a set of visual pattern recognition and shape matching problems, but no explicit mathematical problem to solve. 2. Since the user asked to "Solve these questions" but only described visual pattern problems without specific math questions, we focus on the first problem described. 3. The first problem involves identifying the next shape in a sequence of L shapes with increasing horizontal lines from 1 to 4. 4. The pattern is that each subsequent L shape adds one more horizontal line. 5. Therefore, the next shape in the sequence after 4 horizontal lines is an L shape with 5 horizontal lines. 6. The answer is the letter corresponding to the L shape with 5 horizontal lines, which is 'd' as per the example. Final answer: d