please answe a and b

Table 2: Transfer function for elements and process involved in bubble column system. I. A solution of sugar in water is to be concentrated from 5 wt\% sugar to 20wt% sugar as illustrated in Figure 3. The temperature of air is at about 45C when it is fed continuously to a bubble column and the sugar solution emerges saturated. The transfer functions for the suggested elements are listed in Table 2. [Larutan gula dalam air akan dipekatkan darl 5% berat gula kepada 20% berat gula seperti yang digambarkan dalam Rajah 3. Suhu bagi udara ialah 45C apabila diswaphan berterusan ke gelembing reneh dan cairan gula meryadi pekat. Ranghap pindah bagi cadangan elemen disenaraikan dalam Jadual 2.] Figure 3: Concentration process of sugar solution [Rajah 3: Proses pemekatun larutan gala] (a) Based on Table 2, select the appropriate elements for automatic system purposes and develop the characteristic equation. [Berdasarkan Jadual 2, pilih elemen-elemen yang sesuai bagi tujuan sistem autamatik dan binakan persamaan cir.] (10 Marks/ Markah) (b) Estimate the range of Kc for which the system is on the verge of instability. [Jangkakan julat Ks di mana sistem menghampiri kepoda ketidakstabilan]