1.
1- I, 2- II, 3- III, 4-IV, 5- V, 6- VI, 7- VII, 8- VIII, 9- IX, 10- X.
2.
26 = 10+10+5+1 = XXVI
17 = 10 + 5+2 = XVII
29 = 10+ 10+ 9 = XXIX
30 = 10+10+10 = XXX
3.
15 = XV
21 = XXI
26= XXVI
33 = XXXIII
35= XXXV
44 = XLIV
49 = XLIX
50 = L
4.
70 = LXX
80= LXXX
83 = LXXXIII
89 = LXXXIX
90= XC
100= C
5.
date today X / X/ XXXXII = 10/10/2022
the year 2022 = XXXXII