讲解一下这个问题---**Extracted Content:** **Title:** 铺垫 **Question Stem:** 理发店里有两位理发师，同时来了 4 位顾客，根据他们所要理的发型，分别需要 10、11、14、16 分钟，怎么安排他们理发的顺序，才能使 4 人理发的等候时间 (包括理发时间) 的总和最少? 最少时间为多少? **Other Relevant Text/Calculations:** Proposed Arrangement Scenario 甲: 甲: A C 乙: B D (Note: Visually, this appears as 甲: ① C 乙: ③ D, with ① and ③ circled) Times associated with Scenario 甲 (likely representing assignment to barbers): 10 14 11 16 Calculation associated with Scenario 甲: 10 × 2 + 11 + 14 × 2 + 16 = X (Note: The numbers 10 and 14 are visually underlined in the image). Proposed Arrangement Scenario 乙: 乙: A C 乙: B D (Note: Visually, this appears as 乙: ① C 乙: ③ D, with ① and ③ circled. The arrangement description using letters is the same as 甲, which might be an error in the original content. The times listed below are likely the intended distinction.) Times associated with Scenario 乙 (likely representing assignment to barbers): 10 11 14 16 Calculation associated with Scenario 乙: 10 × 2 + 14 + 11 × 2 + 16 = (Note: The numbers 10 and 11 are visually underlined in the image. The calculation result is not fully visible but is implied to be 72 based on the problem context and common solution methods for this type of scheduling problem). **Options:** No standard multiple-choice options labeled A, B, C, D with numerical values are present in the image. The text "甲: A C 乙: B D" and "乙: A C 乙: B D" (and their circled variants) refer to different proposed arrangements or scenarios being analyzed. **Chart/Diagram Description:** The image displays text content on a large screen, formatted like a page in a book. There are no standard charts or diagrams like line graphs, bar charts, or geometric figures. The visual elements include text, mathematical expressions, and symbolic labels (like circled numbers/letters, underlines). A magnifying glass icon is part of the "铺垫" title graphic.