First, here is a solution file for Ricardo2

Ricardo ran another race. In this race Ricardo wore a watch that broadcasted his speed every *delta* seconds.

Reported speeds are in a table in the Graphing Calculator (GC) file linked below, in the column labeled **R**. To represent (access) an entry, such as **R**_{12}, type

**R** ctrl-L 12 $\rightarrow$.

Typing ctrl-L puts GC in subscript mode. Pressing $\rightarrow$ causes the cursor to move to the next element in the expression, or to the end.

Reminders:

- Type ctrl-L for a subscript
- Press "$\rightarrow$" to escape an exponent, subscript, or move to the next element in an expression.
- Type "*" for multiplication, "/" for division, "+" for addition, "-" for subtraction or negation, and "^" for exponent
- Type ctrl-shift-S for a summation sign ($\sum$)

Download *Ricardo3 * and define functions to represent values of quantities described in it.