（1）VB 用随机函数产生20个两位数的整数,存于4行5列的二维数组中,并求出其中的最大元素及它的行、列坐标,将数组按行

第一题：
Option base 1
Private Sub Form_Click()
Dim a(4,5) as integer ,i as integer ,j as integer ,s as integer
dim a_ave as single
randomize
for i=1 to 4
for j =1 to 5
a(i,j)=int(91*rnd+10)
print Format(a(i,j),"@@@@@@");
next j
print
next i
s=a(1,1)
For i=1 to 4
For j =1 to 5
if a (i,j)