Based on the following project table:   a. Create a network model in the form of Activity and Arrow (AoA) and Activity on Node (AoN) for a company's product marketing project activities using the CPM method

b. Critical path analysis and critical time duration for the company's project

\begin{tabular}{|c|l|c|c|} \hline Activity & \multicolumn{1}{|c|}{ Description } & Predecessor & Duration (day) \\ \hline A & Production Planning & - & 19 \\ \hline B & MarketSurveyandMarketResearch & - & 21 \\ \hline C & Production Analysis & A & 29 \\ \hline D & Modeling Product & A, B & 32 \\ \hline E & Sales Brochures & A, B & 22 \\ \hline F & Cost Analysis & C, E & 34 \\ \hline G & Product Experiment & D, E & 43 \\ \hline H & Sales Training & B, E & 30 \\ \hline I & Cost Pricing & H & 27 \\ \hline J & Project Report & F, G, I & 51 \\ \hline \end{tabular}