Support with relevant legal provision and cases.

2. (a) Although a person has left a partnership business, yet he is still jointly liable for any debt that was incurred when he was a partner. Discuss the effect of this principle. (10) (b) After Ram's death, his partners in business decides not to dissolve the partnership but change the nature of their business. However, his wife claims that they have no right to do so. Advise the partners