Which of the following is an implied authority of a partner?

Under s.19 a partner has implied authority "To purchase on account of the firm any goods of a kind usually employed in the business of the firm"; submitting disputes to arbitration, withdrawing suits and acquiring immovable property are excluded by s.19(2), so "To submit a dispute relating to the business of a firm to arbitration", "To withdraw a suit on behalf of the firm" and "To acquire immovable property on behalf of the firm" are not within implied authority.