From the pair of linear equations in the following problems, and find their solutions graphically.
(i)10 students of Class X took pan in a Mathematics quiz. If the number of girls is 4 more than the number of boys, find the number of boys and girls who took part in the quiz.
(ii)5 pencils and 7 pens together cost Rs 50, whereas 7 pencils and 5 pens together cost Rs 46. Find the cost of one pencil and that of one pen.

Explanation

To solve the given problems graphically, we will follow these steps:

### Problem (i):
**Given:**
- Total students = 10
- Number of girls = Number of boys + 4

**Step 1: Formulate the equations**
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