B. FOUR-VARIABLE: Simplify the following function using a Karnaugh map (K-map): M = AB+ ABCD + CD + BCD + ABCD 48-1) Put the function M into standard sum-of-products (SOP) form. This will require some algebra. Tech 1505 Prelab Assignment for Lab 3. Simplification of Boolean Functions Expt 48-2) Use the grid below to make your K-map: show all work using the map. 4B-3) Write a final expression for M as a simplified algebraic expression from your map. M = Tech 1505 Prelab Assignment for Lab 3. Simplification of Boolean Functions Expt.