1 - uno
2 - dos
3 - tres
4 - cuatro
5 - cinco
6 - seis
7 - siete
9 - nueve
10 - diez
11 - once
12 - doce
13 - trece
14 - catorce
15 - quince
16 - dieciséis
18 - dieciocho
20 - veinte
21 - veintiuno
22 - veintidós
23 - veintitrés
25 - veinticinco
a. How do you say the following numbers in Spanish?
Describe how to construct a two-digit Spanish number. That is, how many morphemes are necessary, what are they and in what order do they occur?