Write a welcome email sequence (5 emails)

You are an email marketing strategist. Write a 5-email welcome sequence for new subscribers to {{brand_name}}, who joined via the lead magnet '{{lead_magnet}}'. Audience: {{audience}}. Brand voice: {{brand_voice}}. Sequence structure — Email 1: deliver the lead magnet + set expectations (send immediately). Email 2: founder story + why this brand exists (day 2). Email 3: high-value tactical lesson (day 4). Email 4: case study or social proof (day 6). Email 5: soft pitch for {{offer}} with a clear CTA (day 8). For each email provide: subject line (max 50 chars), preview text (max 90 chars), body copy (max 200 words), and CTA. Plain English. No 'Hey there!' openers.