a$.$ How many Exxon Mobil April $2020$ $$42\mathrm{.}5$ put options were outstanding at the open of trading on March $13,2020?($Round your answers to $3$ decimal places. $($e$.$g$.,32\mathrm{.}161))$

b$.$ What was the settlement price of a $10-$year Treasury note May $138\mathrm{.}5$ futures call option on March $13,2020?($Round your answers to $4$ decimal places. $($e$.$g$.,32\mathrm{.}1616))$

c$.$ What was the closing price of a March $2,715$ call option on the S&P $500$ Stock Index futures contract on March $13,2020?$ Calculate the dollar price of the March $2,715$ call option on the S&P $500$ Stock Index futures contract on March $13,2020.($Round your answers to $2$ decimal places. $($e$.$g$.,32\mathrm{.}16))$

d$.$ What was the open interest on April $2020$ put options $($with an exercise price of $225)$ on the Dow Jones Industrial Average stock index on March $13,2020?$