[10 Marks] Let a

110 Marks] Let a < b, and Ict bc integrable on [a, b]. Let c,d be two real numbers such that a < e. < d < b. Prove that f is integrable on [c, d] You may use the c-charaeteristic of integrability to do this, if you want, along with any thcorcms about thc parts of the definition of the integral we've proved.