Email graphic and coupon

Hello

Q1.I want to put a picture on the coupon image background. where do we put this code. What exactly is this? We want to put a special graphic design in the e-mail to the customer.

<div class=”gift-card-image”>/woocommerce/emails/gift-card.jpg” /></div>

Q2. Can we give a $ 50 gift voucher to the customer who spends $ 250?