Background of cell to change depending on two conditions

Dear all,

I would like the background of cells I13 to I29 to change if:
1) they are empty AND
2) the 1st digit of their corresponding cell in column A is less than 3.

Could someone please give me a code for this. I have tried to use conditional formatting but I cannot get both conditions together.

Could someone help please.

PS. I do not mind what colour the cell becomes as I guess it will be defined by a number which I can change if necessary.

Thank you in advance for your help.

Regards,
Cdmg

Use this in CF:

=AND(--LEFT($A13,1)<3,$I13="")

Select I13:I29 and invoke Conditional Formatting applying formula:

=AND(I13="",LEFT(A13)+0<3)