) Mambo, an old man suffers from mental illness and poor eyesight .He has two sons, Jeff and Jack who he orally told would inherit his property. However, his mistressChantal, wrote a will on his behalf and convinced him to append his Thumbprint to it. The will transfers all of Mambo`s property to Chantal upon

hisdeath.Mambo has died andhis sonshave discovered aboutChantal`s deception andare

aggrieved

(i) Discuss the legal principles applicable

(ii)Advise Jeff and Jack