Make call to generic class nested function

I have Repository<T> where T is derrived form of BaseEntity class. Repository<T> has IQueryable<T> Table property. I need to make a call to FirstOrDefault method in the Table property.

till now i have got to list the Repositories, but stuck making call to the method using reflection.

private IEnumerable<object> GetEnumerableRepositoryOf<T>(params object[] constructorArgs) where T : class
        {
            List<object> objects = new List<object>();
            foreach (Type type in
                Assembly.GetAssembly(typeof(T)).GetTypes()
                .Where(myType => myType.IsClass && !myType.IsAbstract && myType.IsSubclassOf(typeof(T))))
            {                
                objects.Add(Activator.CreateInstance(typeof(Repository<>).MakeGenericType(type), constructorArgs));
            }
            return objects;
        }

var repoList = GetEnumerableRepositoryOf<BaseEntity>(constructorArgs);
foreach (var repo in repoList)
        {               
            // call FirstOrDefault() here
        }