Karl Horvath, Hein Rüsen, and Carl Thomas formed a partnership, HRT Enterprises, to buy a manufacturing plant. Rüsen and Thomas leased the plant to their own company, Merkur Steel. Merkur then sublet the premises to other companies owned by Rüsen and Thomas. The rent that these companies paid to Merkur was higher than the rent that Merkur paid to HRT. Rüsen and Thomas did not tell Horvath about the subleases. Did Rüsen and Thomas breach their fiduciary duties to HRT and Horvath? Discuss.