A friend of yours started her own dog walking business. At first she only had a couple customers, and she used Word to create all of her business letters. She would create a basic letter, enter a customers name and information, print the letter, and then repeat the process all over again for the next customer. Her business has grown steadily, and she now has almost 200 customers. She needs a new, more efficient way, to send out letters. What would you suggest she do?