6. Let t) = ft) 4-: ft) be the convolution of ft) and ft). Let [1411, :12 be real numbers. {i} Prove the following identity: f1|[t 11):: ft) = 3813):: fg a} = : o). {ii}Prove the following identity: flit {1131*f2li E2] = f\" I11 :12)