FOR VALUE RECEIVED, I/we jointly and severally promise to pay to the ITM Corporation, the sum of ONE MILLION PESOS (1,000,000.00), Philippine currency, the said principal sum to be payable in 24 monthly installments starting July 15, 2021 and every 15thof the month thereafter until fully paid. Signed by makers." Is this instrument payable to bearer, order, or not negotiable at all? Explain.