A question for those who know how to write BASIC programs?

Question

here is the question:
A. write a BASIC program to find the area of 5,000 triangles with white background and blue characters given that the code for white is 7 and the code for blue is 1

B. identify the errors in the program below

cls
Rem program to find the area of a rectangle
print a
colour5,6
A=L*b
input 5,L,b,a
End.

after identifying the errors, re-write the program correctly
THANKS.

Answer 1

color(7,1)
for n=1 to 5000
input side,itsheight
area=side*itsheight*0,5
print "area="
print area
next