micro 8051 please solve it with clear hand write

5. Program timer 0 to generate a square wave of 3 KHz. Assume that XTAL = 20MHz 3. Assuming XTAL = 16MHz, indicate when the TFO flag is raised for the following program: MOV TMOD,#01H MOV TL0,#12H MOV TH0,#ICH SETB TRO