(*) Each row of the spreadsheet below contains the position of a particle at a given time. The times are stored in column B, and the corresponding positions in column A. Column C should contain the average rate of change of position with respect to time, between two consecutive rows. To compute these rates of change, you will write a formula in cell C1 and copy it to cells C2, C3, C4, and C5. Assume all cells not shown below are blank a) What formula should you write in C1? O-(A2-A1)/(B2-B1) (B2-B1)/(A2-A1) position time average rate of change 0 B C ? 123456 3 4 4 5 5 6 8 0 AOO 568 B01347 00 8 -($B$2-$B$1)/($A$2-$A$1) ($B$2-$B$1)/($A$2-$A$1) ($A$2-$A$1)/($B$2-$B$1) (A2-A1)/(B2-B1) ($A$2-$A$1)/($B$2-$B$1) -(B2-B1)/(A2-A1) b) Suppose you copy the formula from C1 to cell C6. What number will be displayed when you press the enter key?