Jean Can Either Type Her Term Paper or Create Web

Jean can either type her term paper or create Web pages during the limited time she has available. The table above shows her PPF.
a) Can Jean type 90 pages and create 2 Web pages?
b) Use the above numbers to calculate the opportunity cost of a typed page as she increases her time typing and decreases time creating a Web page. $$\begin{array} { | l | l | l | l | } \hline \begin{array} { l } \text { Production } \\\text { point }\end{array} & \begin{array} { l } \text { Wheat } \\\text { (bushels) }\end{array} & & \begin{array} { l } \text { Soybeans } \\\text { (bushels) }\end{array} \\\hline A & 1,500 & \text { and } & 0 \\\hline B & 1,000 & \text { and } & 2,250 \\\hline C & 500 & \text { and } & 3,500 \\\hline D & 0 & \text { and } & 4,000 \\\hline\end{array}$$