If log 2=0.30103, the number of digits in 4⁵⁰ is

If log 2=0.3010 and log 3=0.4771, then value of log₅ 512 is

If log₁₀ 2=0.3010 and log₁₀ 3=0.4771, then the value of log₁₀ 1.5 is