2025 additional standard deduction for age 65+ and the new $6,000 senior deduction

There is an additional standard deduction for taxpayers age 65 and over, which was $1,550 each for married filing joint (MFJ) on the 2024 federal Form 1040, which I believe is $1,600 per person MFJ on the 2025 return (to be filed in 2026).  The recently-passed legislation One Big Beautiful Bill provides for a 'senior deduction' of $6,000 per person, phased out beginning with MFJ modified Adjusted Gross Income of $150,000 and over. Question 1: can both these deductions  (the $1,600 and $6,000) be taken on the 2025 income tax return?  

Question 2: regarding the phase-out of $6,000, how will that work and at what income level will it be zero?