Question

Hi!
I am doing homeschooling so I don't have anyone to help me outwithmy studies.I would really appreciate if you could explain thistome.
If I have two plants with the genotypes Rrtt and rrTt whereredcolor(R) is dominant over white(r) and being tall(T) isdominantover being short(t).If I complete a Punnet square, will itlookloke this?:
R r r r
t Rt rt T rT rT
t rt rt t rt rt
Did I do the crossing correctly?
How can I diagram a cross between these plants(this isdihybridcross)with sixteen boxes?What could be the possiblegenotypes andphenotypes from this cross?I searched my entiretextbook, but itdoes not contain any examples of this{ the 16 boxcross}.
Thanks a lot for helping!