75% of a first-order reaction was completed in 32 minutes. What is the time required for its 50% (half) completion?

If the half-life for a first-order reaction A → Products is 200 seconds, the value of the rate constant will be:

If the rate constant (k) is 0.1 min-1, then the half-life (t1/2) of a first-order reaction is:

The half-life of a first-order reaction is 6.93 min. What is the time required (in min) to complete 99% of the reaction? (Given ln 2 = 0.693)