Below are the drying data of a product whose weight of dry solids was 3.765 kg with a drying area of 0.20 m2. The initial weight of the product was 4,944 kg.

Generate:

1. The drying curve of moisture on a dry basis vs. time
2. Generate the drying rate curves (kg water/h m2) versus humidity on a dry basis.
3. From the curves obtained in parts 2.1 and 2.2, determine the magnitude of the drying rate in the constant period and the critical humidity
4. Are there periods of decreasing velocity? If the answer is positive, calculate the time to reach the humidity of 6 kg of water/100 kg dry solids.

\begin{tabular}{|l|l|l|l|l|l|l|l|l|l|l|l|} \hline(h) & 0 & 0.4 & 0.8 & 1.4 & 2.2 & 3 & 4.2 & 5 & 7 & 9 & 12 \\ \hline P(kg) & 4.944 & 4.885 & 4.808 & 4.699 & 4.554 & 4.404 & 4.241 & 4.15 & 4.019 & 3.978 & 3.955 \\ \hline \end{tabular}