I need to be able to grade your tests. If you receive a $90$ or above, you get an A$,80$ to $89\mathrm{.}99$ is a B$,$

$70$ to $79\mathrm{.}99$ is a C$,60$ to $69\mathrm{.}99$ is a D$,$ and any grade below a $60$ is an F$.$ In cells B$20,$C$20,$ and D$20$

prepare an imbedded IF statement formula to calculate the grades for the $3$ students