Answer: The required value of y is 22.Step-by-step explanation: We are given the following function of a and b :[tex]y=3ab+2b^3~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(i)[/tex]We are to find the value of y when a = 1 and b = 2.To find the required value of y, we need to substitute the values of a and b in equation (i).From (i), we get[tex]y=3\times1\times2+2\times2^3=6+16=22.[/tex]Thus, the required value of y is 22.