Calculate the margin required to purchase 1000 shares of DEF stock with a per share price of \\( \\$ 50 \\). The stock is eligible for reduced margin: \\[ \\$ 3,000 \\] (B) \\( \\$ 5,000 \\) \\[ \\$ 15,000 \\] \\[ \\$ 7,500 \\]